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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.

A233667 a(n) = 5*binomial(4*n+10,n)/(2*n+5).

Table of values

n a(n)
0 1
1 10
2 85
3 700
4 5750
5 47502
6 395560
7 3321120
8 28102425
9 239503550
10 2054455634
11 17726454200
12 153757722300
13 1340045361750
14 11729338225200
15 103068670351552
16 908923976461140
17 8041606944709800
18 71359997110169625
19 634978885837495500
20 5664526697522326590

List of values

[1, 10, 85, 700, 5750, 47502, 395560, 3321120, 28102425, 239503550, 2054455634, 17726454200, 153757722300, 1340045361750, 11729338225200, 103068670351552, 908923976461140, 8041606944709800, 71359997110169625, 634978885837495500, 5664526697522326590]

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

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