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.

A333934 Number of permutations of [n] such that the product of the first k elements and the product of the last k elements are multiples of k for all k in [n].

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 8
5 8
6 132
7 272
8 1844
9 7824
10 219392
11 879040
12 9865488
13 30363264
14 1348905760
15 26759363296
16 265338415104
17 1871331759456
18 24675601835904
19 166652846570112
20 1969110048305664
21 22090834149738048
22 2586719545294006272
23 22961806952814951168
24 289429435718440962048

List of values

[1, 1, 2, 2, 8, 8, 132, 272, 1844, 7824, 219392, 879040, 9865488, 30363264, 1348905760, 26759363296, 265338415104, 1871331759456, 24675601835904, 166652846570112, 1969110048305664, 22090834149738048, 2586719545294006272, 22961806952814951168, 289429435718440962048]

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

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