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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.

A206156 a(n) = Sum_{k=0..n} binomial(n,k)^(2*k).

Table of values

n a(n)
0 1
1 2
2 6
3 92
4 5410
5 1400652
6 2687407464
7 18947436116184
8 536104663173431874
9 130559883231879141946580
10 136031455187223511721647272376
11 483565526783420050082035900177878504
12 14487924180895151383693101563813954330590756

List of values

[1, 2, 6, 92, 5410, 1400652, 2687407464, 18947436116184, 536104663173431874, 130559883231879141946580, 136031455187223511721647272376, 483565526783420050082035900177878504, 14487924180895151383693101563813954330590756]

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

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