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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.

A385876 a(n) = 1 + Sum_{k=0..n-1} binomial(k+3,4) * a(k) * a(n-1-k).

Table of values

n a(n)
0 1
1 1
2 2
3 12
4 193
5 6968
6 495189
7 62906143
8 13274340034
9 4393943557987
10 2179423896462618
11 1560476564415661780
12 1563601961040080858376
13 2135883440687340361131857
14 3889446901597262416621276499
15 9260777373178278371280728311304
16 28347247357191779349093896687278933

List of values

[1, 1, 2, 12, 193, 6968, 495189, 62906143, 13274340034, 4393943557987, 2179423896462618, 1560476564415661780, 1563601961040080858376, 2135883440687340361131857, 3889446901597262416621276499, 9260777373178278371280728311304, 28347247357191779349093896687278933]

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

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