A236054 Number of (n+1)X(7+1) 0..2 arrays colored with the difference of the maximum and minimum in each 2X2 subblock

169500, 429252, 981554, 2124772, 5670054, 14531028, 44834198, 103052284, 289710868, 714991524, 2073202494, 5037663196, 14400319528, 35544592788, 102319066146, 250987978892, 715147909084, 1775491235180, 5087033191386

Offset

1,1

Comments

Column 7 of A236055

Links

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

Formula

Empirical: a(n) = 5*a(n-2) +26*a(n-4) -26*a(n-6) -27*a(n-8) -1747*a(n-10) -272*a(n-12) -37717*a(n-14) -62475*a(n-16) +342630*a(n-18) +839939*a(n-20) +4400241*a(n-22) +2441946*a(n-24) -9127258*a(n-26) -22859130*a(n-28) -161997232*a(n-30) -301797384*a(n-32) -438054576*a(n-34) +1413159680*a(n-36) +3841915520*a(n-38) -400228160*a(n-40) -851565568*a(n-42) -1236199808*a(n-44) -2446382592*a(n-46) +1411232256*a(n-48) +27648000*a(n-50) +944087040*a(n-52) +199065600*a(n-54) -1658880000*a(n-56) for n>63

Example

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

Crossrefs

Sequence in context: A308635 A210152 A089203 * A233801 A233802 A233796

Adjacent sequences: A236051 A236052 A236053 * A236055 A236056 A236057

Keyword

nonn

Author

R. H. Hardin, Jan 18 2014

Status

approved