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.

A250802 Number of (5+1) X (n+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)
1 338
2 1336
3 4258
4 12062
5 31220
6 76110
7 177142
8 398704
9 874298
10 1879862
11 3980276
12 8328038
13 17263070
14 35523840
15 72679858
16 148022462
17 300378084
18 607796942
19 1227019286
20 2472564224
21 4975146938
22 9998914966
23 20076555908
24 40280556422

List of values

[338, 1336, 4258, 12062, 31220, 76110, 177142, 398704, 874298, 1879862, 3980276, 8328038, 17263070, 35523840, 72679858, 148022462, 300378084, 607796942, 1227019286, 2472564224, 4975146938, 9998914966, 20076555908, 40280556422]