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 A234458 T(n,k) is the number of (n+1) X (k+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings). 7
 280, 2400, 2400, 21344, 31112, 21344, 192960, 427956, 427956, 192960, 1755520, 6049248, 9249432, 6049248, 1755520, 16026240, 86545688, 207310120, 207310120, 86545688, 16026240, 146415104, 1246417268, 4726887280, 7432565004, 4726887280 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts 280 2400 21344 192960 1755520 2400 31112 427956 6049248 86545688 21344 427956 9249432 207310120 4726887280 192960 6049248 207310120 7432565004 272404175456 1755520 86545688 4726887280 272404175456 16119111514696 16026240 1246417268 108833647220 10112283614188 968883628673536 146415104 17999990956 2516987045248 377695247179700 58682694920811712 1339023360 260509952008 58398272232836 14168309891795076 3573447469469256284 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 FORMULA Empirical for column k: k=1: a(n) = 100*a(n-2) -1384*a(n-4) +1440*a(n-6). k=2: [order 26]. EXAMPLE Some solutions for n=2, k=4: 3 3 3 3 1 3 0 3 3 2 0 0 2 4 2 0 3 0 2 5 0 1 2 3 2 3 1 3 4 2 0 1 2 3 2 0 4 0 3 5 3 3 3 5 3 3 2 5 5 4 3 3 3 5 5 0 3 0 2 5 CROSSREFS Sequence in context: A233724 A233718 A272982 * A234452 A297510 A327948 Adjacent sequences: A234455 A234456 A234457 * A234459 A234460 A234461 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 26 2013 STATUS approved

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Last modified January 30 05:55 EST 2023. Contains 359939 sequences. (Running on oeis4.)