A236090 Number of (n+1)X(2+1) 0..2 arrays colored with the difference of the maximum and the upper median in each 2X2 subblock

344, 1960, 10912, 59398, 321368, 1787690, 9900936, 54118764, 295217284, 1633131298, 9015043100, 49376234152, 270394664828, 1491691040990, 8218703963596, 45077289476146, 247327095667008, 1362361458781028

Offset

1,1

Comments

Column 2 of A236096

Links

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

Formula

Empirical: a(n) = 28*a(n-3) +591*a(n-4) +642*a(n-5) +1360*a(n-6) +3146*a(n-7) -10200*a(n-8) -7734*a(n-9) +9306*a(n-10) -5336*a(n-11) +14804*a(n-12) +19462*a(n-13) -6478*a(n-14) -2372*a(n-15) +3016*a(n-16) +2772*a(n-17) +24*a(n-18) -582*a(n-19) -53*a(n-20) for n>22

Example

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

Crossrefs

Sequence in context: A013306 A044878 A085336 * A237378 A237243 A183680

Adjacent sequences: A236087 A236088 A236089 * A236091 A236092 A236093

Keyword

nonn

Author

R. H. Hardin, Jan 19 2014

Status

approved