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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.

A233896 G.f. satisfies: A(x) = 1 + x*A(x)^2*A(-x)^2 + x^2*(A(x)^2 + A(-x)^2).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 10
5 33
6 72
7 236
8 572
9 1964
10 4800
11 16910
12 42354
13 150670
14 386992
15 1390176
16 3622696
17 13128940
18 34580568
19 126131776
20 335409928
21 1229708169
22 3295834080
23 12137093684
24 32738710652
25 121016095812
26 328220839472
27 1217132137132
28 3316783066620
29 12333770952588

List of values

[1, 1, 2, 6, 10, 33, 72, 236, 572, 1964, 4800, 16910, 42354, 150670, 386992, 1390176, 3622696, 13128940, 34580568, 126131776, 335409928, 1229708169, 3295834080, 12137093684, 32738710652, 121016095812, 328220839472, 1217132137132, 3316783066620, 12333770952588]

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

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