cp's OEIS Frontend

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.

A372411 Coefficient of x^n in the expansion of ( (1-x+x^2)^2 / (1-x)^3 )^n.

Table of values

n a(n)
0 1
1 1
2 7
3 34
4 183
5 1001
6 5578
7 31459
8 179063
9 1026493
10 5918007
11 34277728
12 199309146
13 1162682314
14 6801575641
15 39885002534
16 234384591991
17 1379936226605
18 8137835460115
19 48062073927739
20 284233390132183
21 1682950066882489
22 9975692904121556
23 59190095764321975

List of values

[1, 1, 7, 34, 183, 1001, 5578, 31459, 179063, 1026493, 5918007, 34277728, 199309146, 1162682314, 6801575641, 39885002534, 234384591991, 1379936226605, 8137835460115, 48062073927739, 284233390132183, 1682950066882489, 9975692904121556, 59190095764321975]

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

Content is available under The OEIS End-User License Agreement.