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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.

A376126 a(n) = 1 + Sum_{k=0..n-1} (k+1)^2 * a(k) * a(n-k-1).

Table of values

n a(n)
0 1
1 2
2 11
3 127
4 2446
5 69766
6 2758136
7 144660949
8 9742594594
9 820936644105
10 84720182796109
11 10518406503248799
12 1547501158599695053
13 266325797207877471893
14 53021169588315247959918
15 12092601263851930181412631
16 3132724961425012148414534036
17 914922971820526793968713748093

List of values

[1, 2, 11, 127, 2446, 69766, 2758136, 144660949, 9742594594, 820936644105, 84720182796109, 10518406503248799, 1547501158599695053, 266325797207877471893, 53021169588315247959918, 12092601263851930181412631, 3132724961425012148414534036, 914922971820526793968713748093]

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

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