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 A236427 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 4
 81, 487, 487, 2581, 5772, 2581, 12373, 60193, 60193, 12373, 55929, 544380, 1290539, 544380, 55929, 241933, 4505522, 24143945, 24143945, 4505522, 241933, 1015889, 34394854, 414682711, 987221751, 414682711, 34394854, 1015889, 4174941 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......81........487........2581.........12373.........55929..........241933 ......487.......5772.......60193........544380.......4505522........34394854 .....2581......60193.....1290539......24143945.....414682711......6480932348 ....12373.....544380....24143945.....987221751...38520605664...1385464957395 ....55929....4505522...414682711...38520605664.3626310504837.323039228052666 ...241933...34394854..6480932348.1385464957395 ..1015889..247470127.94263772244 ..4174941.1692391516 .16895401 LINKS R. H. Hardin, Table of n, a(n) for n = 1..50 FORMULA Empirical for column k: k=1: [linear recurrence of order 16] EXAMPLE Some solutions for n=2 k=4 ..0..1..1..2..0....0..1..2..0..2....0..0..0..0..0....0..1..1..0..0 ..1..2..0..0..0....0..1..0..1..0....1..1..1..0..2....1..0..2..1..0 ..2..0..1..2..2....1..1..2..1..0....0..1..1..2..2....2..1..1..2..2 CROSSREFS Column 1 is A235838 Sequence in context: A236646 A205246 A205239 * A235842 A235838 A304617 Adjacent sequences:  A236424 A236425 A236426 * A236428 A236429 A236430 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Jan 25 2014 STATUS approved

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Last modified August 19 16:39 EDT 2022. Contains 356229 sequences. (Running on oeis4.)