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.

A004307 Number of permutations p of [n] such that (n-p(i)+i) mod n >= 4 for all i.

Table of values

n a(n)
4 0
5 1
6 2
7 31
8 264
9 2783
10 30818
11 369321
12 4745952
13 65275999
14 957874226
15 14951584189
16 247524019720
17 4334022049377
18 80052395326514
19 1555999253409203
20 31755107852542144
21 679008663143893773
22 15182701602959054546
23 354364531995856105099
24 8618865446674052425224

List of values

[0, 1, 2, 31, 264, 2783, 30818, 369321, 4745952, 65275999, 957874226, 14951584189, 247524019720, 4334022049377, 80052395326514, 1555999253409203, 31755107852542144, 679008663143893773, 15182701602959054546, 354364531995856105099, 8618865446674052425224]

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

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