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 A204740 T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero 8
 7, 15, 15, 31, 43, 31, 63, 115, 115, 63, 127, 304, 409, 304, 127, 255, 787, 1389, 1389, 787, 255, 511, 2033, 4658, 6176, 4658, 2033, 511, 1023, 5219, 15327, 26680, 26680, 15327, 5219, 1023, 2047, 13398, 50177, 113694, 150132, 113694, 50177, 13398, 2047 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....7....15.....31......63......127.......255........511........1023 ...15....43....115.....304......787......2033.......5219.......13398 ...31...115....409....1389.....4658.....15327......50177......163232 ...63...304...1389....6176....26680....113694.....476919.....1988919 ..127...787...4658...26680...150132....825967....4484324....24023995 ..255..2033..15327..113694...825967...5920734...41716355...290523224 ..511..5219..50177..476919..4484324..41716355..384523522..3504247804 .1023.13398.163232.1988919.24023995.290523224.3504247804.42202897239 LINKS R. H. Hardin, Table of n, a(n) for n = 1..220 EXAMPLE Some solutions for n=4 k=3 ..0..1..1..0....1..0..1..1....1..0..1..1....1..1..0..1....0..1..0..1 ..1..1..0..1....0..1..1..1....1..1..1..0....0..1..1..1....1..0..1..0 ..1..0..1..0....1..0..1..1....1..0..1..1....1..0..1..0....1..1..0..1 ..1..1..1..1....1..1..1..1....0..1..1..1....1..1..1..1....0..1..1..1 ..1..1..1..1....0..1..1..0....1..1..1..1....0..1..0..1....1..1..1..1 CROSSREFS Column 1 is A000225(n+2) Sequence in context: A234861 A076401 A180114 * A244536 A237054 A216848 Adjacent sequences:  A204737 A204738 A204739 * A204741 A204742 A204743 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 18 2012 STATUS approved

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Last modified October 20 07:33 EDT 2019. Contains 328252 sequences. (Running on oeis4.)