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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.

A338979 a(n) = Sum_{k=0..n} n^k * binomial(n,k) * Catalan(k).

Table of values

n a(n)
0 1
1 2
2 13
3 199
4 5073
5 181776
6 8413021
7 478070020
8 32238960193
9 2517734880838
10 223558608409101
11 22248413487603887
12 2453271411779452369
13 296925818848604834448
14 39138393489232585787037
15 5581250331202285217569351
16 856182695406472437496803585
17 140595282922234695782098680030

List of values

[1, 2, 13, 199, 5073, 181776, 8413021, 478070020, 32238960193, 2517734880838, 223558608409101, 22248413487603887, 2453271411779452369, 296925818848604834448, 39138393489232585787037, 5581250331202285217569351, 856182695406472437496803585, 140595282922234695782098680030]

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

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