A236784 Number of (n+1)X(3+1) 0..2 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal

770, 4452, 23675, 145124, 867928, 5547565, 35115362, 230220290, 1500418737, 9979134414, 66066562702, 442916187885, 2958522185818, 19923334638002, 133790392575191, 903336231699074, 6086437605131820, 41161020768714147

Offset

1,1

Comments

Column 3 of A236789

Links

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

R. H. Hardin, Empirical recurrence of order 83

Formula

Empirical recurrence of order 83 (see link above)

Example

Some solutions for n=4
..1..1..2..1....0..0..0..0....0..2..1..1....1..0..1..2....0..2..2..1
..2..0..1..2....1..1..1..1....0..1..1..1....1..1..1..0....1..1..1..0
..1..1..1..2....1..1..1..1....0..1..1..1....1..0..1..1....2..0..2..1
..1..0..2..1....1..1..1..1....0..2..1..2....1..1..2..0....1..1..1..2
..1..2..0..1....2..1..2..1....1..0..0..0....0..1..0..2....0..1..0..1

Crossrefs

Sequence in context: A217495 A216646 A252077 * A205622 A205357 A252551

Adjacent sequences: A236781 A236782 A236783 * A236785 A236786 A236787

Keyword

nonn

Author

R. H. Hardin, Jan 31 2014

Status

approved