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A256806
Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1
1
641, 4219, 28655, 187203, 1226781, 8090191, 53254665, 350253925, 2304752967, 15167443677, 99803396861, 656712280793, 4321347940353, 28435562985711, 187111644664607, 1231234858650427, 8101804934566085, 53311657284829409
OFFSET
1,1
COMMENTS
Column 4 of A256810
LINKS
FORMULA
Empirical: a(n) = a(n-1) +13*a(n-2) +121*a(n-3) +332*a(n-4) -2*a(n-5) -2799*a(n-6) -10186*a(n-7) -9644*a(n-8) +35668*a(n-9) +131106*a(n-10) +139385*a(n-11) -237406*a(n-12) -963982*a(n-13) -836546*a(n-14) +1102384*a(n-15) +3131208*a(n-16) +2840967*a(n-17) -231470*a(n-18) -5676111*a(n-19) -9315120*a(n-20) -5371520*a(n-21) +4171731*a(n-22) +14048634*a(n-23) +17508755*a(n-24) +7866028*a(n-25) -9928026*a(n-26) -20634228*a(n-27) -21124893*a(n-28) -6573699*a(n-29) +10015369*a(n-30) +17679438*a(n-31) +12573402*a(n-32) +4683466*a(n-33) -5611735*a(n-34) -6207729*a(n-35) -4027747*a(n-36) -1377914*a(n-37) +1349443*a(n-38) +824684*a(n-39) +665438*a(n-40) +187860*a(n-41) -123152*a(n-42) -35824*a(n-43) -58908*a(n-44) -8273*a(n-45) +4508*a(n-46) -246*a(n-47) +1776*a(n-48) +64*a(n-49) -46*a(n-50) +30*a(n-51) -12*a(n-52)
EXAMPLE
Some solutions for n=4
..1..0..1..1..1..0....0..1..1..1..1..1....1..0..1..1..1..1....0..1..1..1..0..1
..1..1..1..1..0..1....1..1..1..1..1..1....1..1..1..0..1..1....1..1..1..1..1..1
..1..1..1..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1....1..1..1..0..1..1
..0..1..1..1..1..1....1..0..1..1..1..1....1..1..1..1..1..1....0..1..1..1..1..1
..1..1..1..1..1..0....1..1..1..1..1..0....1..0..1..1..1..1....1..0..1..1..1..1
..1..1..0..1..1..1....0..1..1..1..0..1....1..1..1..1..1..0....1..1..1..1..0..1
CROSSREFS
Sequence in context: A117129 A106488 A259997 * A206164 A206378 A229851
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 10 2015
STATUS
approved