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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A302355 a(n) = coefficient of x^n in the n-th iteration (n-fold self-composition) of the g.f. of triangular numbers (A000217).

Table of values

n a(n)
1 1
2 6
3 72
4 1390
5 37515
6 1307691
7 56000728
8 2847503268
9 167737660533
10 11236731677941
11 843757483026150
12 70200772129462767
13 6410711453857626149
14 637516967943664853331
15 68581800216461580653064
16 7935677122691714769565104
17 982824624566131043920711329
18 129722104862557293606783635718

List of values

[1, 6, 72, 1390, 37515, 1307691, 56000728, 2847503268, 167737660533, 11236731677941, 843757483026150, 70200772129462767, 6410711453857626149, 637516967943664853331, 68581800216461580653064, 7935677122691714769565104, 982824624566131043920711329, 129722104862557293606783635718]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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