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.

A215505 G.f. satisfies: A(x) = 1 + x*A(x)^3*A(x*A(x)^3).

Table of values

n a(n)
0 1
1 1
2 4
3 25
4 200
5 1888
6 20158
7 237357
8 3032188
9 41554144
10 605964370
11 9345693140
12 151727166822
13 2583300560490
14 45984983349166
15 853637181574329
16 16489023127843088
17 330789284905928356
18 6880312907650893934
19 148151276593976715612
20 3297947033016039111690

List of values

[1, 1, 4, 25, 200, 1888, 20158, 237357, 3032188, 41554144, 605964370, 9345693140, 151727166822, 2583300560490, 45984983349166, 853637181574329, 16489023127843088, 330789284905928356, 6880312907650893934, 148151276593976715612, 3297947033016039111690]

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

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