A218317 Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..2 nX6 array

49, 3969, 261121, 16654561, 1065434881, 68184176641, 4363582588561, 279254546449921, 17871334586731521, 1143704311285736641, 73193166320198831361, 4684112443348657152001, 299767184304336708080625

Offset

1,1

Comments

Column 6 of A218319

Links

R. H. Hardin, Table of n, a(n) for n = 1..92

Formula

Empirical: a(n) = 56*a(n-1) +448*a(n-2) +3577*a(n-3) +28616*a(n-4) +228928*a(n-5) -3430*a(n-6) -24696*a(n-7) -24010*a(n-9) -326536*a(n-10) +16807*a(n-12) +117649*a(n-15)

Example

Some solutions for n=3
..0..0..1..1..1..1....0..1..1..1..1..0....0..0..1..0..0..0....0..0..1..1..1..0
..0..0..0..0..1..1....1..0..1..0..1..0....0..0..0..1..0..1....0..1..0..1..1..0
..1..0..1..0..0..1....0..0..0..0..1..0....1..1..0..0..1..1....0..1..0..1..1..0

Crossrefs

Sequence in context: A218204 A218231 A219061 * A283229 A109344 A129207

Adjacent sequences: A218314 A218315 A218316 * A218318 A218319 A218320

Keyword

nonn

Author

R. H. Hardin Oct 25 2012

Status

approved