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 A263337 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with each row and column divisible by 13, read as a base-3 number with top and left being the most significant digits. 3
 3, 7, 7, 19, 19, 19, 57, 57, 57, 57, 169, 409, 277, 409, 169, 505, 2047, 8983, 8983, 2047, 505, 1515, 10747, 86743, 702549, 86743, 10747, 1515, 4543, 70423, 1242727, 18071161, 18071161, 1242727, 70423, 4543, 13627, 427507, 24783643, 805620145 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....3.....7......19.......57......169.......505.....1515...4543.13627 ....7....19......57......409.....2047.....10747....70423.427507 ...19....57.....277.....8983....86743...1242727.24783643 ...57...409....8983...702549.18071161.805620145 ..169..2047...86743.18071161 ..505.10747.1242727 .1515.70423 .4543 LINKS FORMULA Empirical for column k: k=1: a(n) = 3*a(n-1) +a(n-3) -3*a(n-4) EXAMPLE Some solutions for n=3 k=4 ..2..2..2..1..1..1....0..1..0..2..1..2....2..2..2..2..2..2....0..1..2..2..1..0 ..1..0..1..1..2..1....0..0..0..2..2..2....1..1..2..1..1..0....0..0..0..1..1..1 ..2..2..2..2..2..2....1..1..1..2..2..2....2..0..2..0..2..0....2..2..2..2..2..2 ..0..0..0..1..1..1....1..0..1..0..1..0....0..2..0..2..0..2....2..1..0..0..1..2 ..1..2..1..1..0..1....1..1..1..0..0..0....1..0..0..0..1..1....2..2..2..1..1..1 CROSSREFS Sequence in context: A240427 A239047 A229521 * A160994 A113833 A212286 Adjacent sequences: A263334 A263335 A263336 * A263338 A263339 A263340 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 15 2015 STATUS approved

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Last modified March 27 03:58 EDT 2023. Contains 361553 sequences. (Running on oeis4.)