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.

A252926 Number of n X 4 nonnegative integer arrays with upper left 0 and lower right n+4-6 and value increasing by 0 or 1 with every step right or down.

Table of values

n a(n)
1 0
2 1
3 33
4 615
5 6997
6 53950
7 315198
8 1499394
9 6083808
10 21733215
11 69921908
12 206052448
13 563440284
14 1444285973
15 3499040581
16 8065603025
17 17787652381
18 37705694442
19 77126966988
20 152747362302
21 293741640632
22 549886035657

List of values

[0, 1, 33, 615, 6997, 53950, 315198, 1499394, 6083808, 21733215, 69921908, 206052448, 563440284, 1444285973, 3499040581, 8065603025, 17787652381, 37705694442, 77126966988, 152747362302, 293741640632, 549886035657]

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

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