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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.

A369213 Expansion of (1/x) * Series_Reversion( x / ((1+x)^4+x^2) ).

Table of values

n a(n)
0 1
1 4
2 23
3 152
4 1091
5 8264
6 65021
7 526236
8 4352942
9 36637576
10 312763225
11 2701521420
12 23567184019
13 207343098824
14 1837623853627
15 16391011930424
16 147029997389386
17 1325506554640872
18 12003342144724338
19 109136630802023808
20 995907341988015935

List of values

[1, 4, 23, 152, 1091, 8264, 65021, 526236, 4352942, 36637576, 312763225, 2701521420, 23567184019, 207343098824, 1837623853627, 16391011930424, 147029997389386, 1325506554640872, 12003342144724338, 109136630802023808, 995907341988015935]

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

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