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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.

A304193 G.f. A(x) satisfies: [x^n] (1+x)^((n+1)^2) / A(x) = 0 for n>0.

Table of values

n a(n)
0 1
1 4
2 16
3 144
4 2346
5 55236
6 1688084
7 63040736
8 2770165274
9 139623836116
10 7925496107656
11 499719554537584
12 34625595715906866
13 2613946666882042164
14 213475621178226876156
15 18748792440158256161216
16 1761875767691411063734514
17 176383456081424163875684516
18 18739798321516251204837796864
19 2105891800817103192582808107856

List of values

[1, 4, 16, 144, 2346, 55236, 1688084, 63040736, 2770165274, 139623836116, 7925496107656, 499719554537584, 34625595715906866, 2613946666882042164, 213475621178226876156, 18748792440158256161216, 1761875767691411063734514, 176383456081424163875684516, 18739798321516251204837796864, 2105891800817103192582808107856]

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

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