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.

A370270 Coefficient of x^n in the expansion of 1/( (1-x)^2 * (1-x^2)^3 )^n.

Table of values

n a(n)
0 1
1 2
2 16
3 110
4 840
5 6502
6 51424
7 411602
8 3326600
9 27082460
10 221776016
11 1824750424
12 15073212648
13 124926064460
14 1038330110400
15 8651387371360
16 72238476287112
17 604327981885262
18 5064140053702240
19 42500097815152940
20 357157266768270840
21 3005093769261481238

List of values

[1, 2, 16, 110, 840, 6502, 51424, 411602, 3326600, 27082460, 221776016, 1824750424, 15073212648, 124926064460, 1038330110400, 8651387371360, 72238476287112, 604327981885262, 5064140053702240, 42500097815152940, 357157266768270840, 3005093769261481238]

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

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