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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.

A351144 G.f. A(x) satisfies: A(x) = 1 + x^2 * A(x/(1 - 3*x)) / (1 - 3*x).

Table of values

n a(n)
0 1
1 0
2 1
3 3
4 10
5 39
6 181
7 972
8 5797
9 37389
10 258202
11 1905681
12 15016465
13 125920872
14 1117950913
15 10452866439
16 102485649754
17 1050464300187
18 11231883627301
19 125055844922916
20 1447371528438565
21 17382103226123313
22 216221862096537994
23 2781342531957176085
24 36942930754308211969

List of values

[1, 0, 1, 3, 10, 39, 181, 972, 5797, 37389, 258202, 1905681, 15016465, 125920872, 1117950913, 10452866439, 102485649754, 1050464300187, 11231883627301, 125055844922916, 1447371528438565, 17382103226123313, 216221862096537994, 2781342531957176085, 36942930754308211969]

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

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