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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.

A215555 a(n) = binomial(11*n,n)*(9*n+1)/(10*n+1).

Table of values

n a(n)
0 1
1 10
2 209
3 4928
4 122507
5 3137706
6 81921840
7 2167714560
8 57928578191
9 1559830082888
10 42254306265171
11 1150225193717600
12 31437550449182800
13 862165662720962754
14 23713320186494219820
15 653855026849948319616
16 18068367354658442882775
17 500254126810079793897130

List of values

[1, 10, 209, 4928, 122507, 3137706, 81921840, 2167714560, 57928578191, 1559830082888, 42254306265171, 1150225193717600, 31437550449182800, 862165662720962754, 23713320186494219820, 653855026849948319616, 18068367354658442882775, 500254126810079793897130]

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

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