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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.

A278565 a(n) = Sum_{t=1..n} binomial(n,t)*t^(1+(n-t)^2).

Table of values

n a(n)
0 0
1 1
2 4
3 18
4 236
5 12760
6 3162582
7 5965957900
8 147395915019656
9 38431930179989653632
10 90116582088416163834417290
11 2118032070086776060232851050813004
12 966490912699216393489571072350268614425420
13 17165261065730992639912668446254005264689353839299152

List of values

[0, 1, 4, 18, 236, 12760, 3162582, 5965957900, 147395915019656, 38431930179989653632, 90116582088416163834417290, 2118032070086776060232851050813004, 966490912699216393489571072350268614425420, 17165261065730992639912668446254005264689353839299152]

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

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