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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.

A234506 a(n) = binomial(9*n+3, n)/(3*n+1).

Table of values

n a(n)
0 1
1 3
2 30
3 406
4 6327
5 107019
6 1909908
7 35399520
8 674842149
9 13147742322
10 260626484118
11 5239783981320
12 106585537781775
13 2189670831627678
14 45366284782209600
15 946815917066740800
16 19887218367823853937
17 420076689292591271325
18 8917736795123409615060
19 190161017612160607167948
20 4071301730663135449185705

List of values

[1, 3, 30, 406, 6327, 107019, 1909908, 35399520, 674842149, 13147742322, 260626484118, 5239783981320, 106585537781775, 2189670831627678, 45366284782209600, 946815917066740800, 19887218367823853937, 420076689292591271325, 8917736795123409615060, 190161017612160607167948, 4071301730663135449185705]

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

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