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.

A264173 Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive pattern 1324; triangle T(n,k), n>=0, 0<=k<=max(0,floor(n/2-1)), read by rows.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 23
5 1
6 110
7 10
8 632
9 86
10 2
11 4229
12 782
13 29
14 32337
15 7571
16 407
17 5
18 278204
19 78726
20 5856
21 94
22 2659223
23 882997
24 84351
25 2215
26 14
27 27959880
28 10657118
29 1251246
30 48234
31 322
32 320706444
33 137977980
34 19318314
35 984498
36 14322
37 42
38 3985116699
39 1910131680
40 311306106

List of values

[1, 1, 2, 6, 23, 1, 110, 10, 632, 86, 2, 4229, 782, 29, 32337, 7571, 407, 5, 278204, 78726, 5856, 94, 2659223, 882997, 84351, 2215, 14, 27959880, 10657118, 1251246, 48234, 322, 320706444, 137977980, 19318314, 984498, 14322, 42, 3985116699, 1910131680, 311306106]