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 A183972 Half the number of (n+1)X2 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one 1
 128, 992, 7688, 64976, 549152, 4780976, 41623688, 366310352, 3223723808, 28480830608, 251621342408, 2226098835920, 19694339040800, 174322195009040, 1542993019964552, 13660022569173968, 120931341993127712 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A183976 LINKS Ron Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n)=10*a(n-1)-96*a(n-3)+669*a(n-4)-6162*a(n-5)+3936*a(n-6)+20976*a(n-7)-24228*a(n-8)+291240*a(n-9)-94464*a(n-10)-1024704*a(n-11)+385344*a(n-12)-24192*a(n-13)+912384*a(n-15)-331776*a(n-16) EXAMPLE Some solutions for 3X2 ..0..2....1..1....2..0....2..2....0..1....3..1....3..0....3..3....0..1....1..2 ..2..0....0..0....0..2....3..2....2..3....3..1....3..0....1..2....1..2....1..3 ..1..2....0..3....1..1....3..2....0..2....3..1....1..2....3..2....0..1....1..1 ... ...4.......2.......4.......9.......6.......8.......6.......9.......4.......7... ...5.......3.......4......10.......7.......8.......6.......8.......4.......6... CROSSREFS Sequence in context: A188704 A297344 A183976 * A143708 A130813 A206278 Adjacent sequences: A183969 A183970 A183971 * A183973 A183974 A183975 KEYWORD nonn AUTHOR R. H. Hardin Jan 08 2011 STATUS approved

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Last modified December 10 04:38 EST 2023. Contains 367699 sequences. (Running on oeis4.)