A236519 Number of (n+1)X(4+1) 0..1 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

476, 5670, 63208, 655460, 6591144, 63997604, 610630403, 5723134951, 53126385011, 488732268982, 4473422061090, 40764881225427, 370542416886458, 3361057454037610, 30450286475294399, 275604525437140015

Offset

1,1

Comments

Column 4 of A236523

Links

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

R. H. Hardin, Empirical recurrence of order 82

Formula

Empirical recurrence of order 82 (see link above)

Example

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

Crossrefs

Sequence in context: A171077 A234077 A205287 * A205895 A235656 A264290

Adjacent sequences: A236516 A236517 A236518 * A236520 A236521 A236522

Keyword

nonn

Author

R. H. Hardin, Jan 27 2014

Status

approved