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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.

A344717 a(n) = (3n - 9/2 - 1/n + 6/(n+1))*binomial(2n-2,n-1).

Table of values

n a(n)
2 6
3 34
4 169
5 791
6 3576
7 15807
8 68783
9 295867
10 1261468
11 5341128
12 22487906
13 94244294
14 393439840
15 1637091585
16 6792664635
17 28115240595
18 116120791380
19 478689505140
20 1969993524510
21 8095052323410
22 33218808108720
23 136148925337230
24 557389537873974
25 2279607910207326

List of values

[6, 34, 169, 791, 3576, 15807, 68783, 295867, 1261468, 5341128, 22487906, 94244294, 393439840, 1637091585, 6792664635, 28115240595, 116120791380, 478689505140, 1969993524510, 8095052323410, 33218808108720, 136148925337230, 557389537873974, 2279607910207326]

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

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