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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.

A321604 G.f. A(x) satisfies: 1 = Sum_{n>=0} ((1+x)^(4*n) - A(x))^n.

Table of values

n a(n)
0 1
1 4
2 22
3 564
4 25157
5 1499576
6 109904860
7 9480509576
8 937113401201
9 104240673195936
10 12878161899791760
11 1749261564410844864
12 259132759251207789056
13 41585481940418457992816
14 7188476201158569394613976
15 1331880173688346226092103696
16 263358773243148578509342224153
17 55363099822436514905885084770968
18 12330972024423209530808891225876436
19 2900976547500300324930009436969260936

List of values

[1, 4, 22, 564, 25157, 1499576, 109904860, 9480509576, 937113401201, 104240673195936, 12878161899791760, 1749261564410844864, 259132759251207789056, 41585481940418457992816, 7188476201158569394613976, 1331880173688346226092103696, 263358773243148578509342224153, 55363099822436514905885084770968, 12330972024423209530808891225876436, 2900976547500300324930009436969260936]

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