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 A236740 Number of (n+1)X(2+1) 0..2 arrays with the upper median plus the lower median of every 2X2 subblock equal 1
 267, 1411, 7377, 46377, 300555, 2045011, 14169625, 99629489, 705755971, 5023764027, 35858364929, 256373385609, 1834737940219, 13137840357827, 94106513217961, 674219636431201, 4830962111410931, 34617492449991691 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A236746 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 17*a(n-1) -78*a(n-2) -142*a(n-3) +1902*a(n-4) -2258*a(n-5) -14868*a(n-6) +37484*a(n-7) +39431*a(n-8) -204023*a(n-9) +60026*a(n-10) +473554*a(n-11) -502900*a(n-12) -310088*a(n-13) +766120*a(n-14) -297584*a(n-15) -171072*a(n-16) +157120*a(n-17) -32640*a(n-18) EXAMPLE Some solutions for n=4 ..1..1..0....1..1..0....1..1..2....0..1..2....2..0..1....1..0..2....2..1..0 ..1..2..1....1..1..1....1..1..1....2..1..0....0..0..0....0..1..0....1..1..2 ..0..1..1....1..1..2....0..1..1....1..1..1....2..0..0....0..2..0....1..1..0 ..1..1..2....2..0..1....1..1..1....1..2..1....0..0..0....0..1..0....1..1..1 ..2..1..1....1..1..2....1..2..1....0..1..1....0..0..0....2..0..2....2..1..1 CROSSREFS Sequence in context: A232106 A049014 A186056 * A278382 A062037 A244194 Adjacent sequences: A236737 A236738 A236739 * A236741 A236742 A236743 KEYWORD nonn AUTHOR R. H. Hardin, Jan 30 2014 STATUS approved

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Last modified August 12 16:47 EDT 2024. Contains 375113 sequences. (Running on oeis4.)