A236140 Number of (n+1)X(2+1) 0..3 arrays colored with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock

2976, 79260, 2113860, 56388240, 1503850638, 40110759152, 1069867016024, 28536871273336, 761125924608458, 20300768006274458, 541469807189678490, 14442309765297348684, 385207864338207023016, 10274348880475607720026

Offset

1,1

Comments

Column 2 of A236142

Links

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

Example

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

Crossrefs

Sequence in context: A272285 A124595 A186549 * A281330 A289455 A360666

Adjacent sequences: A236137 A236138 A236139 * A236141 A236142 A236143

Keyword

nonn

Author

R. H. Hardin, Jan 19 2014

Status

approved