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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.

A137958 G.f. satisfies A(x) = 1 + x*(1 + x*A(x)^3)^4.

Table of values

n a(n)
0 1
1 1
2 4
3 18
4 100
5 587
6 3660
7 23640
8 157076
9 1066281
10 7363620
11 51568732
12 365369868
13 2614235293
14 18862816112
15 137096744232
16 1002785827620
17 7376023180645
18 54525165453672
19 404858512190316
20 3018190533410664
21 22581907465905018

List of values

[1, 1, 4, 18, 100, 587, 3660, 23640, 157076, 1066281, 7363620, 51568732, 365369868, 2614235293, 18862816112, 137096744232, 1002785827620, 7376023180645, 54525165453672, 404858512190316, 3018190533410664, 22581907465905018]

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

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