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.

A335459 Number of permutations of the prime indices of n! with at least one non-singleton run.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 4
5 18
6 102
7 786
8 3960
9 51450
10 675570
11 10804710
12 139674024
13 2793377664
14 58662908640
15 1798893694080
16 26985313555200
17 782574083010720
18 25992638958686400
19 857757034323189000
20 30021498596590300800
21 1563341714743040232000
22 64179292280096037844800
23 2631350957341279888915200

List of values

[0, 0, 0, 0, 4, 18, 102, 786, 3960, 51450, 675570, 10804710, 139674024, 2793377664, 58662908640, 1798893694080, 26985313555200, 782574083010720, 25992638958686400, 857757034323189000, 30021498596590300800, 1563341714743040232000, 64179292280096037844800, 2631350957341279888915200]

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

Content is available under The OEIS End-User License Agreement.