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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.

A005260 a(n) = Sum_{k = 0..n} binomial(n,k)^4.

Table of values

n a(n)
0 1
1 2
2 18
3 164
4 1810
5 21252
6 263844
7 3395016
8 44916498
9 607041380
10 8345319268
11 116335834056
12 1640651321764
13 23365271704712
14 335556407724360
15 4854133484555664
16 70666388112940818
17 1034529673001901732
18 15220552520052960516
19 224929755893153896200
20 3337324864503769353060

List of values

[1, 2, 18, 164, 1810, 21252, 263844, 3395016, 44916498, 607041380, 8345319268, 116335834056, 1640651321764, 23365271704712, 335556407724360, 4854133484555664, 70666388112940818, 1034529673001901732, 15220552520052960516, 224929755893153896200, 3337324864503769353060]

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

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