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.

A254161 Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Table of values

n a(n)
1 512
2 3036
3 16240
4 76832
5 348032
6 1511152
7 6440848
8 27128324
9 113712184
10 475820928
11 1990141264
12 8325715216
13 34837433912
14 145798977252
15 610246788472
16 2554332033248
17 10691962218368
18 44754714079088
19 187335498849168

List of values

[512, 3036, 16240, 76832, 348032, 1511152, 6440848, 27128324, 113712184, 475820928, 1990141264, 8325715216, 34837433912, 145798977252, 610246788472, 2554332033248, 10691962218368, 44754714079088, 187335498849168]

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

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