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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.

A264224 G.f. A(x) satisfies: A(x)^2 = A( x^2/(1-4*x) ), with A(0) = 0.

Table of values

n a(n)
1 1
2 2
3 7
4 26
5 103
6 422
7 1774
8 7604
9 33109
10 146042
11 651256
12 2931392
13 13301038
14 60775340
15 279393742
16 1291311620
17 5996491666
18 27962898020
19 130883946751
20 614664907706
21 2895279687655
22 13674609742598
23 64744203198388
24 307221794213768
25 1460778188820220
26 6958635514922552
27 33205258829750809
28 158699556581760134

List of values

[1, 2, 7, 26, 103, 422, 1774, 7604, 33109, 146042, 651256, 2931392, 13301038, 60775340, 279393742, 1291311620, 5996491666, 27962898020, 130883946751, 614664907706, 2895279687655, 13674609742598, 64744203198388, 307221794213768, 1460778188820220, 6958635514922552, 33205258829750809, 158699556581760134]

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

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