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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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2014
STATUS
approved

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Last modified July 22 09:51 EDT 2024. Contains 374490 sequences. (Running on oeis4.)