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 A186869 Number of (n+1)X4 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums 1
 361, 24414, 431016, 12048996, 270129432, 6869877312, 162868019530, 4042781079474, 97568985207226, 2401857269073876, 58373470048298950, 1431967704538476946, 34909706847661265062, 854981421174931771662 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A186871 LINKS R. H. Hardin, Table of n, a(n) for n = 1..39 EXAMPLE Some solutions for 3X4 ..1..2..2..1....0..2..0..1....2..1..1..0....1..0..0..2....2..0..1..0 ..2..1..1..2....2..0..2..1....1..0..0..1....0..0..1..0....0..1..2..1 ..2..1..2..0....0..2..1..1....1..2..2..1....2..0..1..1....0..2..1..2 CROSSREFS Sequence in context: A231996 A302385 A303106 * A185612 A302957 A232081 Adjacent sequences: A186866 A186867 A186868 * A186870 A186871 A186872 KEYWORD nonn AUTHOR R. H. Hardin Feb 27 2011 STATUS approved

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Last modified December 6 18:41 EST 2023. Contains 367614 sequences. (Running on oeis4.)