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.

A250819 Number of (7+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Table of values

n a(n)
1 41112
2 131455
3 315561
4 641571
5 1167796
6 1962717
7 3104985
8 4683421
9 6797016
10 9554931
11 13076497
12 17491215
13 22938756
14 29568961
15 37541841
16 47027577
17 58206520
18 71269191
19 86416281
20 103858651
21 123817332
22 146523525
23 172218601
24 201154101

List of values

[41112, 131455, 315561, 641571, 1167796, 1962717, 3104985, 4683421, 6797016, 9554931, 13076497, 17491215, 22938756, 29568961, 37541841, 47027577, 58206520, 71269191, 86416281, 103858651, 123817332, 146523525, 172218601, 201154101]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.