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.

A279886 a(n) = A057863(n+1) * Sum_{k=0..n}(k! / (2*k+1)!!).

Table of values

n a(n)
0 1
1 4
2 66
3 7200
4 6917400
5 72442188000
6 9822893856930000
7 19942863749656848000000
8 687732249521129504041350000000
9 450437284567157389148103391935000000000
10 6194243041031315772374678081343893262937500000000

List of values

[1, 4, 66, 7200, 6917400, 72442188000, 9822893856930000, 19942863749656848000000, 687732249521129504041350000000, 450437284567157389148103391935000000000, 6194243041031315772374678081343893262937500000000]

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

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