A236889 Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock equal

2605, 19005, 134361, 1107653, 9168057, 83876241, 790250057, 8009517233, 83737435605, 917784582345, 10269819192521, 117934655230729, 1369232459021877, 16101100336780961, 190317918014799501

Offset

1,1

Comments

Column 4 of A236893

Links

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

R. H. Hardin, Empirical recurrence of order 59

Formula

Empirical recurrence of order 59 (see link above)

Example

Some solutions for n=3
..0..0..0..2..1....0..1..2..1..2....0..2..2..1..2....0..1..2..1..1
..1..2..1..2..0....2..0..0..2..0....2..2..0..1..0....1..2..1..0..0
..0..0..2..0..1....1..2..1..0..1....2..0..0..1..2....2..1..2..1..1
..1..2..1..2..2....2..0..0..2..2....2..2..0..1..0....1..0..1..0..0

Crossrefs

Sequence in context: A109487 A015309 A212083 * A254695 A054258 A236666

Adjacent sequences: A236886 A236887 A236888 * A236890 A236891 A236892

Keyword

nonn

Author

R. H. Hardin, Feb 01 2014

Status

approved