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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.

A276361 G.f. satisfies: A(x - 2*A(x)^2) = x + A(x)^2.

Table of values

n a(n)
1 1
2 3
3 30
4 447
5 8202
6 171846
7 3956796
8 97916895
9 2567551890
10 70655670690
11 2026596875268
12 60282027684678
13 1852444347792036
14 58633762133405100
15 1907098496516434680
16 63620675921801106495
17 2173457638433471757282
18 75940916632597398212298
19 2710857429948875567968692
20 98775527832178103444182722
21 3670845430153146908693608044
22 139047871842184594320103381524
23 5365224711989826990651317756232

List of values

[1, 3, 30, 447, 8202, 171846, 3956796, 97916895, 2567551890, 70655670690, 2026596875268, 60282027684678, 1852444347792036, 58633762133405100, 1907098496516434680, 63620675921801106495, 2173457638433471757282, 75940916632597398212298, 2710857429948875567968692, 98775527832178103444182722, 3670845430153146908693608044, 139047871842184594320103381524, 5365224711989826990651317756232]

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

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