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.

A253008 Number of nX5 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down.

Table of values

n a(n)
1 4
2 19
3 54
4 124
5 250
6 14795
7 309990
8 2853292
9 14125312
10 46481352
11 116171792
12 240747928
13 438003360
14 725775144
15 1121905200
16 1644235704
17 2310608832
18 3138866760
19 4146851664
20 5352405720
21 6773371104
22 8427589992
23 10332904560

List of values

[4, 19, 54, 124, 250, 14795, 309990, 2853292, 14125312, 46481352, 116171792, 240747928, 438003360, 725775144, 1121905200, 1644235704, 2310608832, 3138866760, 4146851664, 5352405720, 6773371104, 8427589992, 10332904560]

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

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