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.

A370217 Coefficient of x^n in the expansion of ( (1+x)^2 / (1-x^3)^3 )^n.

Table of values

n a(n)
0 1
1 2
2 6
3 29
4 166
5 927
6 5055
7 27687
8 153702
9 861950
10 4862481
11 27543111
12 156571951
13 892919445
14 5106591405
15 29275176204
16 168181755750
17 967967551701
18 5580293663274
19 32217589171489
20 186253647533841
21 1078046039503182
22 6246592211179337
23 36231065957573793

List of values

[1, 2, 6, 29, 166, 927, 5055, 27687, 153702, 861950, 4862481, 27543111, 156571951, 892919445, 5106591405, 29275176204, 168181755750, 967967551701, 5580293663274, 32217589171489, 186253647533841, 1078046039503182, 6246592211179337, 36231065957573793]

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

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