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 A208872 T(n,k)=Number of nXk 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors 14
 1, 2, 2, 5, 12, 5, 15, 136, 143, 15, 51, 1798, 6520, 1979, 51, 187, 24472, 307165, 324682, 28246, 187, 715, 334618, 14493405, 52947540, 16205218, 405481, 715, 2795, 4578580, 683903931, 8624977114, 9130195864, 808928836, 5826959, 2795, 11051, 62655190 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ....1........2.............5................15.....................51 ....2.......12...........136..............1798..................24472 ....5......143..........6520............307165...............14493405 ...15.....1979........324682..........52947540.............8624977114 ...51....28246......16205218........9130195864..........5134914951163 ..187...405481.....808928836.....1574432811027.......3057224057476808 ..715..5826959...40380275500...271499374919883....1820216057105650386 .2795.83752328.2015711853262.46818078167209471.1083724145919960847502 LINKS R. H. Hardin, Table of n, a(n) for n = 1..160 EXAMPLE Some solutions for n=4 k=3 ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..1..0 ..1..1..2....1..1..0....1..1..0....1..1..1....1..2..3....1..1..1....0..2..2 ..2..1..1....2..1..1....2..2..1....2..2..0....3..0..1....2..0..2....1..3..1 ..0..2..1....2..2..1....0..1..3....1..0..1....2..3..2....2..1..0....1..3..2 CROSSREFS Column 1 and row 1 are A007581(n-1) Sequence in context: A230090 A286465 A208258 * A208581 A233357 A248664 Adjacent sequences: A208869 A208870 A208871 * A208873 A208874 A208875 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 02 2012 STATUS approved

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Last modified March 24 15:23 EDT 2023. Contains 361479 sequences. (Running on oeis4.)