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 A234245 T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant stress 1X1 tilings) 5
 630, 6706, 6706, 72616, 99630, 72616, 790718, 1520024, 1520024, 790718, 8612920, 23428586, 32965378, 23428586, 8612920, 93934380, 361889580, 725628904, 725628904, 361889580, 93934380, 1023822944, 5604275160, 16021165696 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ...........630...........6706...........72616..........790718..........8612920 ..........6706..........99630.........1520024........23428586........361889580 .........72616........1520024........32965378.......725628904......16021165696 ........790718.......23428586.......725628904.....22918035530.....726655747532 .......8612920......361889580.....16021165696....726655747532...33111026973070 ......93934380.....5604275160....354931091338..23141164047392.1516841073336664 ....1023822944....86776363660...7860119921126.736603691141316 ...11170450750..1346057282610.174432581257432 ..121790634482.20871073347970 .1329240620840 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 FORMULA Empirical for column k: k=1: [linear recurrence of order 8] k=2: [order 45] EXAMPLE Some solutions for n=2 k=4 ..0..0..0..3..0....0..0..6..5..6....0..4..0..4..3....0..0..0..1..5 ..4..6..4..5..4....0..2..6..3..6....0..6..4..6..3....4..6..4..3..5 ..0..4..0..3..0....4..4..6..1..6....2..6..2..6..5....0..4..4..5..5 CROSSREFS Sequence in context: A295769 A110904 A171258 * A234241 A185849 A058832 Adjacent sequences:  A234242 A234243 A234244 * A234246 A234247 A234248 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 21 2013 STATUS approved

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Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)