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 A234424 Number of (n+1)X(1+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 14 and no adjacent elements equal 1
 448, 4516, 44140, 453728, 4641220, 47946684, 494928936, 5118554604, 52929477520, 547525514800, 5663733188684, 58591028515180, 606119482599020, 6270340071097572, 64866996054961716, 671054166304469780 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A234428 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 9*a(n-1) +64*a(n-2) -451*a(n-3) -1542*a(n-4) +7659*a(n-5) +16809*a(n-6) -48643*a(n-7) -76610*a(n-8) +75468*a(n-9) +91816*a(n-10) -33928*a(n-11) -30960*a(n-12) EXAMPLE Some solutions for n=3 ..2..0....7..0....4..7....0..6....1..5....7..5....0..3....6..7....6..7....5..0 ..5..7....6..1....0..6....3..7....0..7....0..2....7..6....2..0....0..6....3..5 ..0..3....2..4....2..7....0..2....5..6....7..4....6..0....7..3....4..7....5..0 ..2..7....6..1....0..3....5..0....7..1....1..5....7..6....5..0....0..1....7..6 CROSSREFS Sequence in context: A234438 A048632 A234428 * A234175 A234170 A120104 Adjacent sequences:  A234421 A234422 A234423 * A234425 A234426 A234427 KEYWORD nonn AUTHOR R. H. Hardin, Dec 25 2013 STATUS approved

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Last modified August 3 08:53 EDT 2020. Contains 336197 sequences. (Running on oeis4.)