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.

A189650 T(n,k) = Number of n X k array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

Table of values

n a(n)
1 1
2 2
3 1
4 3
5 9
6 1
7 5
8 33
9 32
10 1
11 8
12 185
13 263
14 121
15 1
16 13
17 913
18 4277
19 2161
20 450
21 1
22 21
23 4777
24 55440
25 107080
26 17655
27 1681
28 1
29 34
30 24577
31 799069
32 3774889
33 2631821
34 144353
35 6272
36 1
37 55
38 127385
39 11047585
40 157346785
41 250758892
42 64890337
43 1180167
44 23409
45 1
46 89

List of values

[1, 2, 1, 3, 9, 1, 5, 33, 32, 1, 8, 185, 263, 121, 1, 13, 913, 4277, 2161, 450, 1, 21, 4777, 55440, 107080, 17655, 1681, 1, 34, 24577, 799069, 3774889, 2631821, 144353, 6272, 1, 55, 127385, 11047585, 157346785, 250758892, 64890337, 1180167, 23409, 1, 89]