

A236012


Number of (n+1)X(2+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock


1



306, 1126, 3744, 12544, 41844, 140716, 471308, 1580152, 5294132, 17749124, 59488776, 199400040, 668327516, 2240142740, 7508500744, 25167109004, 84355063048, 282742241052, 947697217680, 3176499039060, 10647009866132
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OFFSET

1,1


COMMENTS

Column 2 of A236018


LINKS

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


FORMULA

Empirical: a(n) = 5*a(n2) +10*a(n3) +26*a(n4) +33*a(n5) +11*a(n6) 9*a(n7) 7*a(n8) 2*a(n9) for n>11


EXAMPLE

Some solutions for n=5
..2..2..0....2..2..0....0..1..2....1..2..0....1..1..2....2..0..1....1..2..1
..1..2..2....2..1..1....1..1..1....1..1..0....0..0..1....2..1..0....2..1..0
..0..1..2....0..1..2....1..1..0....1..1..0....2..1..0....1..1..2....0..0..1
..0..0..0....1..1..0....2..2..2....1..2..1....2..2..1....1..1..2....0..1..2
..2..1..1....1..1..0....0..1..2....0..1..2....0..1..2....0..0..1....1..2..1
..1..2..0....0..0..2....0..1..0....0..0..0....0..0..2....2..0..0....2..2..0


CROSSREFS

Sequence in context: A294596 A294710 A206271 * A158589 A030030 A206679
Adjacent sequences: A236009 A236010 A236011 * A236013 A236014 A236015


KEYWORD

nonn


AUTHOR

R. H. Hardin, Jan 18 2014


STATUS

approved



