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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.

A215554 a(n) = binomial(10*n,n)*(8*n+1)/(9*n+1).

Table of values

n a(n)
0 1
1 9
2 170
3 3625
4 81510
5 1888460
6 44602348
7 1067658735
8 25810820750
9 628737007195
10 15408077648040
11 379444514503119
12 9382177773301060
13 232775087755980000
14 5792018711632340160
15 144481310070897555910
16 3611955405113118024990
17 90470699668284950782170

List of values

[1, 9, 170, 3625, 81510, 1888460, 44602348, 1067658735, 25810820750, 628737007195, 15408077648040, 379444514503119, 9382177773301060, 232775087755980000, 5792018711632340160, 144481310070897555910, 3611955405113118024990, 90470699668284950782170]

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

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