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.

A253005 Number of n X n 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 0
2 0
3 0
4 1
5 250
6 54219
7 14697256
8 5713126349
9 3406380649146
10 3235013673306411
11 5006915703789559516
12 12814921349279258614386
13 54759970343589573849950696
14 393147238947490609962950665584
15 4762079888047633609309896734274288

List of values

[0, 0, 0, 1, 250, 54219, 14697256, 5713126349, 3406380649146, 3235013673306411, 5006915703789559516, 12814921349279258614386, 54759970343589573849950696, 393147238947490609962950665584, 4762079888047633609309896734274288]

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

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