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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.

A352861 a(n) = 1 + Sum_{k=0..n-1} binomial(n+2,k+3) * a(k).

Table of values

n a(n)
0 1
1 2
2 7
3 28
4 121
5 570
6 2911
7 15968
8 93433
9 580162
10 3806275
11 26284368
12 190415809
13 1442982350
14 11409436363
15 93913277608
16 803094241309
17 7121757279798
18 65383520552131
19 620517308328812
20 6079168380979213
21 61402851498255790
22 638674759049919079
23 6833589979500278700

List of values

[1, 2, 7, 28, 121, 570, 2911, 15968, 93433, 580162, 3806275, 26284368, 190415809, 1442982350, 11409436363, 93913277608, 803094241309, 7121757279798, 65383520552131, 620517308328812, 6079168380979213, 61402851498255790, 638674759049919079, 6833589979500278700]

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

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