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 A236738 Number of (n+1)X(n+1) 0..2 arrays with the upper median plus the lower median of every 2X2 subblock equal 0
 81, 1411, 68839, 17740369, 14977205669, 41970035313995, 367339284802529639, 10214681449663016578969, 894198234345435455356272041 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A236746 LINKS EXAMPLE Some solutions for n=3 ..2..1..2..0....0..2..1..2....1..1..1..0....0..1..1..1....1..1..1..2 ..0..1..0..2....1..1..1..0....2..1..1..1....2..1..2..0....0..1..0..1 ..2..1..1..1....1..1..1..1....1..0..1..1....0..1..0..2....2..1..1..2 ..0..1..0..1....2..1..1..0....1..1..1..0....1..1..2..0....1..1..0..1 CROSSREFS Sequence in context: A116205 A237455 A253488 * A236801 A282646 A283542 Adjacent sequences:  A236735 A236736 A236737 * A236739 A236740 A236741 KEYWORD nonn AUTHOR R. H. Hardin, Jan 30 2014 STATUS approved

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Last modified August 22 05:00 EDT 2019. Contains 326172 sequences. (Running on oeis4.)