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.

A252972 Number of nX4 nonnegative integer arrays with upper left 0 and lower right n+4-5 and value increasing by 0 or 1 with every step right or down.

Table of values

n a(n)
1 1
2 13
3 153
4 1236
5 6997
6 30802
7 112877
8 359550
9 1024773
10 2667554
11 6438457
12 14575914
13 31230978
14 63789948
15 124931040
16 235737421
17 430298389
18 762367687
19 1314817821
20 2212837300
21 3642069999
22 5873199042
23 9294839027
24 14457028052
25 22128113529

List of values

[1, 13, 153, 1236, 6997, 30802, 112877, 359550, 1024773, 2667554, 6438457, 14575914, 31230978, 63789948, 124931040, 235737421, 430298389, 762367687, 1314817821, 2212837300, 3642069999, 5873199042, 9294839027, 14457028052, 22128113529]

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

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