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.

A331277 Array read by antidiagonals: A(n,k) is the number of binary matrices with k distinct columns and any number of nonzero rows with n ones in every column and columns in decreasing lexicographic order.

Table of values

n a(n)
0 1
1 1
2 1
3 0
4 1
5 1
6 0
7 1
8 1
9 1
10 0
11 1
12 6
13 1
14 1
15 0
16 1
17 62
18 31
19 1
20 1
21 0
22 1
23 900
24 2649
25 160
26 1
27 1
28 0
29 1
30 16824
31 441061
32 116360
33 841
34 1
35 1
36 0
37 1
38 384668
39 121105865
40 231173330
41 5364701
42 4494
43 1
44 1
45 0
46 1
47 10398480
48 49615422851
49 974787170226
50 131147294251
51 256452714
52 24319
53 1
54 1

List of values

[1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 6, 1, 1, 0, 1, 62, 31, 1, 1, 0, 1, 900, 2649, 160, 1, 1, 0, 1, 16824, 441061, 116360, 841, 1, 1, 0, 1, 384668, 121105865, 231173330, 5364701, 4494, 1, 1, 0, 1, 10398480, 49615422851, 974787170226, 131147294251, 256452714, 24319, 1, 1]