A266128 Number of nX5 integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.
9, 149, 278, 3851, 62104, 326145, 4176690, 50677045, 367191341, 4343077168, 47557102126, 393190838218, 4413622529512, 46442066137513, 412349942225648, 4457850641709751, 46051121628392952, 427183303899673724
Offset: 1
Keywords
Examples
Some solutions for n=4 ..1..1..0..0..1....2..1..2..0..0....0..0..1..2..0....1..0..2..1..0 ..1..0..2..1..1....0..1..2..3..0....1..2..3..2..1....0..1..1..3..2 ..0..2..2..2..2....1..2..2..0..1....0..1..3..0..0....1..1..1..1..2 ..0..0..1..1..0....1..0..0..1..1....2..1..1..2..1....1..0..1..1..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A266131.
Comments