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.

A190918 Number of permutations of n copies of 1..4 introduced in order 1..4 with no element equal to another within a distance of 1.

Table of values

n a(n)
1 1
2 36
3 1721
4 94376
5 5609649
6 351574834
7 22875971289
8 1530622143864
9 104650147201049
10 7279277647839552
11 513492654638478897
12 36647810215955194122
13 2641438793287744496337
14 191996676519223794534702
15 14057702378132873242943289
16 1035863834231020871413190808

List of values

[1, 36, 1721, 94376, 5609649, 351574834, 22875971289, 1530622143864, 104650147201049, 7279277647839552, 513492654638478897, 36647810215955194122, 2641438793287744496337, 191996676519223794534702, 14057702378132873242943289, 1035863834231020871413190808]

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

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