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A185572 Number of (n+1)X2 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum 1
256, 3392, 44944, 598688, 7974976, 106125920, 1412256400, 18797516000, 250200040000, 3330057490400, 44321667132304, 589910483825696, 7851563387466304, 104502021786889760, 1390891472006784400 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A185575
LINKS
FORMULA
Empirical: a(n)=6*a(n-1)+692*a(n-3)+5325*a(n-4)+24966*a(n-5)+137368*a(n-6)+200736*a(n-7)-730404*a(n-8)-4060664*a(n-9)-19780992*a(n-10)-30858624*a(n-11)+110419200*a(n-12)+328084992*a(n-13)-615112704*a(n-15)-429981696*a(n-16)
EXAMPLE
Some solutions for 3X2
..1..1....2..2....3..3....0..0....1..2....3..0....1..3....3..2....1..1....2..2
..3..2....1..3....2..0....2..2....0..0....0..0....3..2....1..1....0..3....1..2
..1..0....3..0....0..1....0..2....1..0....2..2....3..2....1..2....1..3....0..0
CROSSREFS
Sequence in context: A070056 A185575 A185933 * A185925 A205281 A185923
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 31 2011
STATUS
approved

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Last modified February 29 09:21 EST 2024. Contains 370418 sequences. (Running on oeis4.)