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.

A116701 Number of permutations of length n that avoid the patterns 132, 4321.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 13
5 31
6 66
7 127
8 225
9 373
10 586
11 881
12 1277
13 1795
14 2458
15 3291
16 4321
17 5577
18 7090
19 8893
20 11021
21 13511
22 16402
23 19735
24 23553
25 27901
26 32826
27 38377
28 44605
29 51563
30 59306
31 67891
32 77377
33 87825
34 99298
35 111861
36 125581
37 140527
38 156770
39 174383
40 193441
41 214021

List of values

[1, 1, 2, 5, 13, 31, 66, 127, 225, 373, 586, 881, 1277, 1795, 2458, 3291, 4321, 5577, 7090, 8893, 11021, 13511, 16402, 19735, 23553, 27901, 32826, 38377, 44605, 51563, 59306, 67891, 77377, 87825, 99298, 111861, 125581, 140527, 156770, 174383, 193441, 214021]