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.

A252875 Number of nX7 nonnegative integer arrays with upper left 0 and lower right n+7-4 and value increasing by 0 or 1 with every step right or down.

Table of values

n a(n)
1 15
2 211
3 1948
4 12686
5 64920
6 277585
7 1030330
8 3407823
9 10237249
10 28340232
11 73128376
12 177500233
13 408299906
14 895580310
15 1882850350
16 3810729118
17 7452433875
18 14127861337
19 26034391284
20 46747817584
21 81967052716
22 140602733711

List of values

[15, 211, 1948, 12686, 64920, 277585, 1030330, 3407823, 10237249, 28340232, 73128376, 177500233, 408299906, 895580310, 1882850350, 3810729118, 7452433875, 14127861337, 26034391284, 46747817584, 81967052716, 140602733711]

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

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