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.

A233058 Number of (n+1)X(1+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing.

Table of values

n a(n)
1 7
2 16
3 33
4 66
5 132
6 265
7 530
8 1052
9 2092
10 4183
11 8354
12 16635
13 33179
14 66383
15 132711
16 264751
17 528676
18 1057904
19 2115653
20 4224206
21 8439821
22 16888361
23 33778253
24 67474289
25 134850638
26 269827760
27 539703540
28 1078399254
29 2155614282
30 4313028554

List of values

[7, 16, 33, 66, 132, 265, 530, 1052, 2092, 4183, 8354, 16635, 33179, 66383, 132711, 264751, 528676, 1057904, 2115653, 4224206, 8439821, 16888361, 33778253, 67474289, 134850638, 269827760, 539703540, 1078399254, 2155614282, 4313028554]