login
A185793
Number of (n+1)X5 binary arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum
1
260, 576, 1336, 3756, 9368, 24392, 59944, 164576, 411300, 1098776, 2746164, 7479296, 18813148, 50697072, 127845936, 346693136, 877012028, 2367167080, 6003249108, 16226037056, 41232724008, 111162587792, 283070770512
OFFSET
1,1
COMMENTS
Column 4 of A185798
LINKS
FORMULA
Empirical: a(n)=4*a(n-2)+a(n-3)+88*a(n-4)-4*a(n-5)-302*a(n-6)-56*a(n-7)-3011*a(n-8)+230*a(n-9)+8945*a(n-10)+1175*a(n-11)+50431*a(n-12)-4786*a(n-13)-132374*a(n-14)-11295*a(n-15)-423460*a(n-16)+43810*a(n-17)+1037899*a(n-18)+43580*a(n-19)+1627709*a(n-20)-167180*a(n-21)-4270500*a(n-22)+13370*a(n-23)-2421933*a(n-24)+185580*a(n-25)+8757664*a(n-26)-114436*a(n-27)+689723*a(n-28)-14276*a(n-29)-9492848*a(n-30)+67928*a(n-31)+1771248*a(n-32)-70176*a(n-33)+5431680*a(n-34)+19712*a(n-35)-1877632*a(n-36)+8192*a(n-37)-1478592*a(n-38)-2048*a(n-39)+659456*a(n-40)+131072*a(n-42)-65536*a(n-44) for n>45
EXAMPLE
Some solutions for 3X5
..0..0..0..0..1....1..1..1..0..0....1..0..1..1..1....0..1..1..1..1
..0..1..1..0..1....0..0..1..0..1....0..0..1..1..0....1..0..1..1..0
..1..1..1..0..0....0..1..0..0..1....0..0..0..1..0....0..0..1..0..1
CROSSREFS
Sequence in context: A139408 A253504 A154379 * A237631 A202585 A037219
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 04 2011
STATUS
approved