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.

A250793 Number of (n+1) X (4+1) 0..1 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

n a(n)
1 118
2 376
3 1190
4 3776
5 12062
6 38676
7 124366
8 400616
9 1292134
10 4171276
11 13474406
12 43546448
13 140781326
14 455247108
15 1472416318
16 4762930232
17 15408574198
18 49852141564
19 161298304598
20 521908159904
21 1688775756830
22 5464620624372

List of values

[118, 376, 1190, 3776, 12062, 38676, 124366, 400616, 1292134, 4171276, 13474406, 43546448, 140781326, 455247108, 1472416318, 4762930232, 15408574198, 49852141564, 161298304598, 521908159904, 1688775756830, 5464620624372]