A236083 Number of (n+1)X(1+1) 0..3 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock

256, 2400, 22506, 211560, 1998580, 18841712, 177646290, 1674513256, 15787986826, 148843166800, 1403280508044, 13229588080992, 124726066140698, 1175883681522224, 11085965466380794, 104515595490058104

Offset

1,1

Comments

Column 1 of A236087

Links

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

Formula

Empirical: a(n) = 224*a(n-3) +2810*a(n-4) +13856*a(n-5) +90672*a(n-6) +291072*a(n-7) +952484*a(n-8) +1912080*a(n-9) -1157526*a(n-10) -12079672*a(n-11) -80765163*a(n-12) -186815512*a(n-13) -311515244*a(n-14) -242959664*a(n-15) +1413551712*a(n-16) +3132342592*a(n-17) +6646937984*a(n-18) +3604272384*a(n-19) -10896930560*a(n-20) -17680504832*a(n-21) -26707124224*a(n-22) +5417844736*a(n-23) +14742724608*a(n-24) +16130326528*a(n-25) +19947962368*a(n-26) -13724549120*a(n-27) +9831972864*a(n-28) -12022972416*a(n-29)

Example

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

Crossrefs

Sequence in context: A235261 A236087 A204303 * A016780 A236041 A236037

Adjacent sequences: A236080 A236081 A236082 * A236084 A236085 A236086

Keyword

nonn

Author

R. H. Hardin, Jan 19 2014

Status

approved