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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.

A323280 a(n) = Sum_{k=0..n} binomial(n,k) * k^(2*k).

Table of values

n a(n)
0 1
1 2
2 19
3 781
4 68553
5 10100761
6 2236373953
7 693667946945
8 286962262702657
9 152652510206521921
10 101513694573289791441
11 82511051259976074269425
12 80480313356721971865934369
13 92773167329045961244649105633
14 124768226258051318899374299271601

List of values

[1, 2, 19, 781, 68553, 10100761, 2236373953, 693667946945, 286962262702657, 152652510206521921, 101513694573289791441, 82511051259976074269425, 80480313356721971865934369, 92773167329045961244649105633, 124768226258051318899374299271601]

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

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