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.

A250544 T(n,k) = number of (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction.

Table of values

n a(n)
1 150
2 1080
3 1080
4 6627
5 10704
6 6627
7 36552
8 79366
9 79366
10 36552
11 187000
12 491650
13 644779
14 491650
15 187000
16 905440
17 2701872
18 4169584
19 4169584
20 2701872
21 905440
22 4206453
23 13657024
24 23289547
25 27240292
26 23289547
27 13657024
28 4206453
29 18933408

List of values

[150, 1080, 1080, 6627, 10704, 6627, 36552, 79366, 79366, 36552, 187000, 491650, 644779, 491650, 187000, 905440, 2701872, 4169584, 4169584, 2701872, 905440, 4206453, 13657024, 23289547, 27240292, 23289547, 13657024, 4206453, 18933408]