A237176 Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the minimum minus the lower median of every 2X2 subblock

81, 402, 2061, 10488, 53401, 271420, 1382012, 7030000, 35777132, 182015816, 926277176, 4712685384, 23981258640, 122017499720, 620885520496, 3159152802944, 16075071138944, 81793354856096, 416193955519360

Offset

1,1

Comments

Column 1 of A237182

Links

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

Formula

Empirical: a(n) = 32*a(n-3) +288*a(n-4) +464*a(n-5) +2632*a(n-6) +2144*a(n-7) +6720*a(n-8) +3624*a(n-9) -10064*a(n-10) -96*a(n-11) -52480*a(n-12) -13312*a(n-13) -1536*a(n-14) -16384*a(n-15) +81920*a(n-16)

Example

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

Crossrefs

Sequence in context: A074387 A008848 A237182 * A357015 A102741 A253495

Adjacent sequences: A237173 A237174 A237175 * A237177 A237178 A237179

Keyword

nonn

Author

R. H. Hardin, Feb 04 2014

Status

approved