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 A204736 Number of (n+1)X5 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero 1
 63, 304, 1389, 6176, 26680, 113694, 476919, 1988919, 8234596, 34021482, 140153550, 577020406, 2373119682, 9758784830, 40115635266, 164904149636, 677790994154, 2785909304418, 11450373331929, 47062739127883, 193431925936638 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A204740 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +30*a(n-2) -14*a(n-3) -363*a(n-4) +75*a(n-5) +2444*a(n-6) -156*a(n-7) -10383*a(n-8) -177*a(n-9) +29550*a(n-10) +1794*a(n-11) -57869*a(n-12) -4627*a(n-13) +78312*a(n-14) +6440*a(n-15) -71976*a(n-16) -5208*a(n-17) +42880*a(n-18) +2304*a(n-19) -14928*a(n-20) -432*a(n-21) +2304*a(n-22) EXAMPLE Some solutions for n=4 ..1..1..0..1..1....0..1..0..1..1....0..1..1..0..1....0..1..0..1..1 ..1..0..1..1..1....1..0..1..1..1....1..1..0..1..1....1..1..1..1..1 ..1..1..0..1..1....1..1..0..1..1....0..1..1..0..1....0..1..0..1..1 ..0..1..1..1..1....0..1..1..1..1....1..0..1..1..1....1..1..1..1..1 ..1..1..0..1..1....1..0..1..1..1....1..1..0..1..1....0..1..0..1..1 CROSSREFS Sequence in context: A063398 A359564 A138833 * A160674 A034817 A160895 Adjacent sequences: A204733 A204734 A204735 * A204737 A204738 A204739 KEYWORD nonn AUTHOR R. H. Hardin Jan 18 2012 STATUS approved

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Last modified March 20 22:04 EDT 2023. Contains 361391 sequences. (Running on oeis4.)