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 A187280 Number of (n+2) X 3 0..2 arrays with every 2 X 2 subblock sum equal to some diagonal or antidiagonal neighbor 2 X 2 subblock sum. 1
 711, 859, 20529, 79499, 868277, 5031413, 43307435, 292250165, 2308333343, 16530790801, 126385412189, 927198993151, 6998506191721, 51873562337879, 389498512776673, 2900304246591069, 21729379461164643, 162152529828908201 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A187283. LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 EXAMPLE Some solutions for 4 X 3 ..1..2..0....1..2..0....1..2..2....2..0..2....0..2..2....1..0..1....0..1..1 ..1..2..1....1..0..2....1..0..0....1..1..1....2..0..0....1..1..1....1..2..0 ..0..2..1....1..2..0....1..2..2....1..1..1....0..2..2....1..0..1....1..0..2 ..2..2..0....1..0..2....1..0..0....2..0..2....2..0..0....1..1..1....2..1..1 CROSSREFS Cf. A187283. Sequence in context: A220593 A252965 A187283 * A265197 A269060 A265142 Adjacent sequences:  A187277 A187278 A187279 * A187281 A187282 A187283 KEYWORD nonn AUTHOR R. H. Hardin Mar 07 2011 STATUS approved

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Last modified July 1 15:17 EDT 2022. Contains 354973 sequences. (Running on oeis4.)