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.

A330942 Array read by antidiagonals: A(n,k) is the number of binary matrices with k columns and any number of nonzero rows with n ones in every column and columns in nonincreasing lexicographic order.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 2
8 1
9 1
10 1
11 4
12 7
13 1
14 1
15 1
16 8
17 75
18 32
19 1
20 1
21 1
22 16
23 1105
24 2712
25 161
26 1
27 1
28 1
29 32
30 20821
31 449102
32 116681
33 842
34 1
35 1
36 1
37 64
38 478439
39 122886128
40 231522891
41 5366384
42 4495
43 1
44 1
45 1
46 128
47 12977815
48 50225389432
49 975712562347
50 131163390878
51 256461703
52 24320
53 1
54 1

List of values

[1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 4, 7, 1, 1, 1, 8, 75, 32, 1, 1, 1, 16, 1105, 2712, 161, 1, 1, 1, 32, 20821, 449102, 116681, 842, 1, 1, 1, 64, 478439, 122886128, 231522891, 5366384, 4495, 1, 1, 1, 128, 12977815, 50225389432, 975712562347, 131163390878, 256461703, 24320, 1, 1]