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 A187441 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors 10
 81, 646, 646, 5344, 14178, 5344, 44195, 311730, 311730, 44195, 365485, 6858445, 18257013, 6858445, 365485, 3022484, 150878368, 1070374436, 1070374436, 150878368, 3022484, 24995294, 3319295436, 62735788524, 167339492229 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ..........81............646..............5344..............44195 .........646..........14178............311730............6858445 ........5344.........311730..........18257013.........1070374436 .......44195........6858445........1070374436.......167339492229 ......365485......150878368.......62735788524.....26149356865336 .....3022484.....3319295436.....3677337022406...4086873166309438 ....24995294....73023484028...215547981233289.638715674028172903 ...206705746..1606497082565.12634446300216814 ..1709412335.35342494847192 .14136474668 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for 4X3 ..2..0..1....2..0..0....2..0..0....1..0..0....2..0..0....1..0..0....2..0..1 ..0..1..1....1..1..2....1..1..0....2..2..2....2..1..0....1..0..2....2..2..2 ..0..1..1....0..2..2....2..0..2....0..0..2....2..2..2....2..0..1....0..0..2 ..2..0..1....2..2..1....1..1..1....2..0..2....1..2..1....2..2..0....0..2..0 CROSSREFS Sequence in context: A185848 A237629 A236720 * A187433 A269055 A236876 Adjacent sequences:  A187438 A187439 A187440 * A187442 A187443 A187444 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 10 2011 STATUS approved

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Last modified May 7 17:19 EDT 2021. Contains 343652 sequences. (Running on oeis4.)