cp's OEIS Frontend

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.

A353013 a(n) = Sum_{k=0..floor(n/2)} (n-2*k)^(n-k).

Table of values

n a(n)
0 1
1 1
2 4
3 28
4 264
5 3207
6 47696
7 839412
8 17061280
9 393264145
10 10135913792
11 288839201432
12 9017184333440
13 306045200463519
14 11220008681600256
15 441866073895351128
16 18603606156815235584
17 833860238440653331505
18 39643749441387211150336

List of values

[1, 1, 4, 28, 264, 3207, 47696, 839412, 17061280, 393264145, 10135913792, 288839201432, 9017184333440, 306045200463519, 11220008681600256, 441866073895351128, 18603606156815235584, 833860238440653331505, 39643749441387211150336]

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

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