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 A207141 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor 0
 50, 48, 157, 190, 622, 754, 2482, 3010, 9922, 12034, 39682, 48130, 158722, 192514, 634882, 770050, 2539522, 3080194, 10158082, 12320770, 40632322, 49283074, 162529282, 197132290 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A207149 LINKS EXAMPLE Some solutions for n=4 ..2..1..0..1..0....1..1..0..1..0....2..2..0..1..0....0..2..0..1..0 ..1..0..1..0..1....1..0..1..0..1....1..0..2..0..1....1..0..2..0..1 ..0..1..0..1..0....0..1..0..1..0....0..1..0..2..0....0..1..0..2..0 ..2..0..1..0..1....1..0..1..0..1....1..0..1..0..2....1..0..1..0..2 ..0..2..0..1..2....0..1..0..1..0....0..1..0..1..1....0..1..0..1..2 CROSSREFS Sequence in context: A244277 A248688 A291495 * A256958 A165871 A171652 Adjacent sequences:  A207138 A207139 A207140 * A207142 A207143 A207144 KEYWORD nonn AUTHOR R. H. Hardin Feb 15 2012 STATUS approved

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Last modified October 17 18:58 EDT 2019. Contains 328127 sequences. (Running on oeis4.)