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.

A252980 Number of n X 5 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down.

Table of values

n a(n)
1 6
2 41
3 266
4 1247
5 4657
6 67537
7 433401
8 1481460
9 3510600
10 6637020
11 10878576
12 16235268
13 22707096
14 30294060
15 38996160
16 48813396
17 59745768
18 71793276
19 84955920
20 99233700
21 114626616
22 131134668
23 148757856
24 167496180
25 187349640
26 208318236

List of values

[6, 41, 266, 1247, 4657, 67537, 433401, 1481460, 3510600, 6637020, 10878576, 16235268, 22707096, 30294060, 38996160, 48813396, 59745768, 71793276, 84955920, 99233700, 114626616, 131134668, 148757856, 167496180, 187349640, 208318236]

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

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