A221443 Hilltop maps: number of nX5 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 nX5 array

17, 429, 10593, 260557, 6415089, 157933741, 3888200065, 95724317069, 2356654610641, 58018914711981, 1428378365629601, 35165510520296269, 865746191545503153, 21313965220121585837, 524732442187736997569

Offset

1,1

Comments

Column 5 of A221446

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 17*a(n-1) +168*a(n-2) +464*a(n-3) +442*a(n-4) +30*a(n-5) -88*a(n-6) -9*a(n-8) +a(n-9)

Example

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

Crossrefs

Sequence in context: A196676 A027404 A053114 * A222648 A167474 A158063

Adjacent sequences: A221440 A221441 A221442 * A221444 A221445 A221446

Keyword

nonn

Author

R. H. Hardin Jan 17 2013

Status

approved