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.

A252925 Number of n X 3 nonnegative integer arrays with upper left 0 and lower right n+3-6 and value increasing by 0 or 1 with every step right or down.

Table of values

n a(n)
1 0
2 0
3 1
4 33
5 413
6 2859
7 13976
8 54199
9 177848
10 513905
11 1342933
12 3233784
13 7275049
14 15451358
15 31234528
16 60485192
17 112793064
18 203424686
19 356097793
20 606862907
21 1009447181
22 1642504781
23 2619324320
24 4100669333
25 6311574992
26 9563095895

List of values

[0, 0, 1, 33, 413, 2859, 13976, 54199, 177848, 513905, 1342933, 3233784, 7275049, 15451358, 31234528, 60485192, 112793064, 203424686, 356097793, 606862907, 1009447181, 1642504781, 2619324320, 4100669333, 6311574992, 9563095895]

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

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