A235655 Number of (n+1)X(3+1) 0..1 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise

160, 1368, 11236, 85700, 627189, 4396769, 29920256, 198335901, 1289725913, 8254247466, 52203733525, 327041542672, 2034356588846, 12585148968678, 77538471852097, 476245181222104, 2918495960358086, 17854830618129496

Offset

1,1

Comments

Column 3 of A235660

Links

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

R. H. Hardin, Empirical recurrence of order 69

Formula

Empirical recurrence of order 69 (see link above)

Example

Some solutions for n=4
..1..0..1..1....1..0..1..1....0..0..0..1....0..1..0..1....0..0..1..0
..0..0..0..1....0..0..0..1....1..0..1..0....0..0..1..1....0..0..0..0
..0..1..0..1....0..0..1..1....1..1..0..0....0..1..1..0....1..0..0..0
..0..0..1..1....0..1..1..1....0..1..0..1....1..1..1..1....0..0..0..0
..0..1..0..1....0..0..0..1....1..1..0..0....0..0..0..1....0..0..1..1

Crossrefs

Sequence in context: A166778 A236518 A120103 * A281404 A127409 A013447

Adjacent sequences: A235652 A235653 A235654 * A235656 A235657 A235658

Keyword

nonn

Author

R. H. Hardin, Jan 13 2014

Status

approved