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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.

A369126 Expansion of (1/x) * Series_Reversion( x / ((1+x)^4+x^4) ).

Table of values

n a(n)
0 1
1 4
2 22
3 140
4 970
5 7104
6 54096
7 424008
8 3398224
9 27721024
10 229410328
11 1921308272
12 16253502512
13 138683973120
14 1192142838656
15 10314377770720
16 89749921081280
17 784913791336192
18 6895599255571840
19 60825440855493376
20 538507243041624864
21 4783482648574893056

List of values

[1, 4, 22, 140, 970, 7104, 54096, 424008, 3398224, 27721024, 229410328, 1921308272, 16253502512, 138683973120, 1192142838656, 10314377770720, 89749921081280, 784913791336192, 6895599255571840, 60825440855493376, 538507243041624864, 4783482648574893056]

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

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