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.

A226167 Array read by antidiagonals: a(i,j) is the number of ways of labeling a tableau of shape (i,1^j) with the integers 1, 2, ... i+j-2 (each label being used once) such that the first row is decreasing, and the first column has m-1 labels.

Table of values

n a(n)
1 1
2 3
3 1
4 12
5 5
6 1
7 60
8 27
9 7
10 1
11 360
12 168
13 48
14 9
15 1
16 2520
17 1200
18 360
19 75
20 11
21 1
22 20160
23 9720
24 3000
25 660
26 108
27 13
28 1
29 181440
30 88200
31 27720
32 6300
33 1092
34 147
35 15
36 1
37 1814400
38 887040
39 282240
40 65520
41 11760
42 1680
43 192
44 17
45 1
46 19958400
47 9797760
48 3144960
49 740880
50 136080
51 20160
52 2448
53 243
54 19
55 1

List of values

[1, 3, 1, 12, 5, 1, 60, 27, 7, 1, 360, 168, 48, 9, 1, 2520, 1200, 360, 75, 11, 1, 20160, 9720, 3000, 660, 108, 13, 1, 181440, 88200, 27720, 6300, 1092, 147, 15, 1, 1814400, 887040, 282240, 65520, 11760, 1680, 192, 17, 1, 19958400, 9797760, 3144960, 740880, 136080, 20160, 2448, 243, 19, 1]