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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.

A349185 G.f. A(x) satisfies: A(x) = (1 - x) / (1 - 2 * x - x^2 - x^2 * A(x)).

Table of values

n a(n)
0 1
1 1
2 4
3 11
4 35
5 111
6 365
7 1221
8 4160
9 14371
10 50251
11 177503
12 632514
13 2271027
14 8208259
15 29840993
16 109049568
17 400352639
18 1475929092
19 5461571729
20 20279092033
21 75531360153
22 282123848574
23 1056539226257
24 3966214054639
25 14922195004703
26 56258116929483
27 212505815364639
28 804142811583006

List of values

[1, 1, 4, 11, 35, 111, 365, 1221, 4160, 14371, 50251, 177503, 632514, 2271027, 8208259, 29840993, 109049568, 400352639, 1475929092, 5461571729, 20279092033, 75531360153, 282123848574, 1056539226257, 3966214054639, 14922195004703, 56258116929483, 212505815364639, 804142811583006]

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

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