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https://math.answers.com/other-math/A_list_of_triangular_numbers_up_to_120

A list of triangular numbers up to 120? - Answers

Formula for the nth Triangular Number: t(n) = 1/2n(n + 1) OR t(n) = (n2 + n)/2 t(0) = 0 t(1) = 1 t(2) = 3 t(3) = 6 t(4) = 10 t(5) = 15 t(6) = 21 t(7) = 28 t(8) = 36 t(9) = 45 t(10) = 55 t(11) = 66 t(12) = 78 t(13) = 91 t(14) = 104 t(15) = 120 For a more extensive list, or for more any more information about the Triangular Numbers, type "Triangular Numbers" into Google. You'll find lots of helpful websites there.



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A list of triangular numbers up to 120? - Answers

https://math.answers.com/other-math/A_list_of_triangular_numbers_up_to_120

Formula for the nth Triangular Number: t(n) = 1/2n(n + 1) OR t(n) = (n2 + n)/2 t(0) = 0 t(1) = 1 t(2) = 3 t(3) = 6 t(4) = 10 t(5) = 15 t(6) = 21 t(7) = 28 t(8) = 36 t(9) = 45 t(10) = 55 t(11) = 66 t(12) = 78 t(13) = 91 t(14) = 104 t(15) = 120 For a more extensive list, or for more any more information about the Triangular Numbers, type "Triangular Numbers" into Google. You'll find lots of helpful websites there.



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https://math.answers.com/other-math/A_list_of_triangular_numbers_up_to_120

A list of triangular numbers up to 120? - Answers

Formula for the nth Triangular Number: t(n) = 1/2n(n + 1) OR t(n) = (n2 + n)/2 t(0) = 0 t(1) = 1 t(2) = 3 t(3) = 6 t(4) = 10 t(5) = 15 t(6) = 21 t(7) = 28 t(8) = 36 t(9) = 45 t(10) = 55 t(11) = 66 t(12) = 78 t(13) = 91 t(14) = 104 t(15) = 120 For a more extensive list, or for more any more information about the Triangular Numbers, type "Triangular Numbers" into Google. You'll find lots of helpful websites there.

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      Formula for the nth Triangular Number: t(n) = 1/2n(n + 1) OR t(n) = (n2 + n)/2 t(0) = 0 t(1) = 1 t(2) = 3 t(3) = 6 t(4) = 10 t(5) = 15 t(6) = 21 t(7) = 28 t(8) = 36 t(9) = 45 t(10) = 55 t(11) = 66 t(12) = 78 t(13) = 91 t(14) = 104 t(15) = 120 For a more extensive list, or for more any more information about the Triangular Numbers, type "Triangular Numbers" into Google. You'll find lots of helpful websites there.
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