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.

A284845 Number of permutations on [n+4] with no circular 4-successions.

Table of values

n a(n)
1 90
2 468
3 2982
4 22320
5 191106
6 1838220
7 19599822
8 229257288
9 2917290090
10 40107565764
11 592302134070
12 9349254600288
13 157059054215442
14 2797498002296700
15 52657059745734366
16 1044337677676754040
17 21765735199891598202
18 475573090189331643828
19 10870086948032475194310

List of values

[90, 468, 2982, 22320, 191106, 1838220, 19599822, 229257288, 2917290090, 40107565764, 592302134070, 9349254600288, 157059054215442, 2797498002296700, 52657059745734366, 1044337677676754040, 21765735199891598202, 475573090189331643828, 10870086948032475194310]

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

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