A237029 Number of (n+1) X (2+1) 0..2 arrays with the maximum of every 2 X 2 subblock equal.

563, 11205, 221994, 4552617, 93224611, 1918085364, 39451935691, 811987649749, 16711113378122, 343953320541489, 7079284019757859, 145708327358170052, 2999015488433549923, 61726799222630392869, 1270482524400967939690

Offset

1,1

Comments

Column 2 of A237035.

Links

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

Formula

Empirical: a(n) = 22*a(n-1) +31*a(n-2) -1351*a(n-3) +2166*a(n-4) +3313*a(n-5) -5940*a(n-6) +1760*a(n-7).

Example

Some solutions for n=2:
..1..0..0....2..1..2....0..2..1....0..1..1....0..2..2....0..1..2....1..0..2
..1..0..1....2..0..2....1..0..2....2..0..2....0..0..0....1..2..1....2..2..0
..1..1..1....2..1..2....0..2..1....0..1..0....1..2..0....1..0..1....0..2..0

Crossrefs

Cf. A237035.

Sequence in context: A135437 A142759 A187849 * A183732 A014361 A274471

Adjacent sequences: A237026 A237027 A237028 * A237030 A237031 A237032

Keyword

nonn

Author

R. H. Hardin, Feb 02 2014

Status

approved