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 A255101 T(n,k) = Number of (n+2) X (k+2) 0..1 arrays with no 3 X 3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1. 9
 36, 77, 77, 179, 189, 179, 419, 539, 539, 419, 991, 1475, 1838, 1475, 991, 2345, 4075, 6110, 6110, 4075, 2345, 5537, 11573, 20928, 25413, 20928, 11573, 5537, 13105, 32627, 72639, 106848, 106848, 72639, 32627, 13105, 31063, 91821, 250704, 454332, 554091 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....36.....77......179.......419........991........2345.........5537 ....77....189......539......1475.......4075.......11573........32627 ...179....539.....1838......6110......20928.......72639.......250704 ...419...1475.....6110.....25413.....106848......454332......1933924 ...991...4075....20928....106848.....554091.....2926453.....15422602 ..2345..11573....72639....454332....2926453....19198366....125525340 ..5537..32627...250704...1933924...15422602...125525340...1018478173 .13105..91821...868395...8248373...81332263...822095802...8275662960 .31063.259851..3018347..35227773..430226255..5400253601..67453730450 .73591.734851.10479598.150417081.2275433973.35458215276.549630067102 LINKS R. H. Hardin, Table of n, a(n) for n = 1..419 FORMULA Empirical for column k: k=1: [linear recurrence of order 11] for n > 12; k=2: [order 14]; k=3: [order 29] for n > 31; k=4: [order 46] for n > 50; k=5: [order 83] for n > 88. EXAMPLE Some solutions for n=4, k=4 ..1..0..1..1..1..1....0..1..1..0..1..1....1..1..1..1..1..0....1..1..1..1..0..1 ..1..1..1..0..1..1....1..1..1..1..1..1....1..1..1..1..1..1....1..0..1..1..1..0 ..0..1..1..1..1..1....1..1..1..1..0..1....1..1..1..1..1..1....1..1..1..1..1..1 ..1..1..1..1..1..1....1..1..1..1..1..1....1..0..1..1..1..1....1..1..1..1..1..1 ..1..0..1..1..1..1....0..1..1..1..1..1....1..1..1..1..1..0....1..1..1..1..1..1 ..1..1..1..1..1..0....1..1..0..1..1..0....1..1..0..1..1..1....1..1..1..1..0..1 CROSSREFS Sequence in context: A034813 A319602 A262796 * A255094 A261284 A111163 Adjacent sequences: A255098 A255099 A255100 * A255102 A255103 A255104 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 14 2015 STATUS approved

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Last modified March 20 22:57 EDT 2023. Contains 361392 sequences. (Running on oeis4.)