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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.

A303290 G.f. A(x) satisfies: 2 = Sum_{n>=0} (1/2^n) * (1+x)^(n^2) / A(x)^n.

Table of values

n a(n)
0 1
1 3
2 15
3 225
4 6003
5 223029
6 10403175
7 577700889
8 37009173207
9 2679339499305
10 216031850406327
11 19187294118006057
12 1861057604220294591
13 195742656849628038465
14 22192660352433291780159
15 2698458809215198981964481
16 350326879575505922875480047
17 48370384900519379918253881361
18 7078145146554395463373624118319
19 1094300840117324691452685873392145

List of values

[1, 3, 15, 225, 6003, 223029, 10403175, 577700889, 37009173207, 2679339499305, 216031850406327, 19187294118006057, 1861057604220294591, 195742656849628038465, 22192660352433291780159, 2698458809215198981964481, 350326879575505922875480047, 48370384900519379918253881361, 7078145146554395463373624118319, 1094300840117324691452685873392145]

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

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