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.

A370269 Coefficient of x^n in the expansion of 1/( (1-x) * (1-x^2)^3 )^n.

Table of values

n a(n)
0 1
1 1
2 9
3 37
4 233
5 1251
6 7461
7 43219
8 257769
9 1534096
10 9224259
11 55607850
12 336885029
13 2046705428
14 12472585155
15 76185639162
16 466380345065
17 2860318763352
18 17571932737128
19 108111252582449
20 666049600308483
21 4108363051479346
22 25369393216077370

List of values

[1, 1, 9, 37, 233, 1251, 7461, 43219, 257769, 1534096, 9224259, 55607850, 336885029, 2046705428, 12472585155, 76185639162, 466380345065, 2860318763352, 17571932737128, 108111252582449, 666049600308483, 4108363051479346, 25369393216077370]

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

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