A218636 Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 nX6 array

57, 4065, 262017, 16773477, 1073471633, 68702054721, 4396930705721, 281403528942981, 18009823835462025, 1152628595873880165, 73768221838169850821, 4721165666554240664629, 302154568669832438214889

Offset

1,1

Comments

Column 6 of A218638

Links

R. H. Hardin, Table of n, a(n) for n = 1..74

Example

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

Crossrefs

Sequence in context: A218808 A218194 A218370 * A218240 A281567 A012165

Adjacent sequences: A218633 A218634 A218635 * A218637 A218638 A218639

Keyword

nonn

Author

R. H. Hardin Nov 03 2012

Status

approved