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 A252397 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4 6
 2205, 21544, 21544, 224346, 437023, 224346, 2302050, 9807871, 9807871, 2302050, 23364738, 203636149, 454970982, 203636149, 23364738, 237415904, 4246242886, 19516646285, 19516646285, 4246242886, 237415904, 2418956843, 89843675557 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......2205.......21544.........224346...........2302050............23364738 .....21544......437023........9807871.........203636149..........4246242886 ....224346.....9807871......454970982.......19516646285........851022689884 ...2302050...203636149....19516646285.....1721897188968.....153561179184793 ..23364738..4246242886...851022689884...153561179184793...28203141901710764 .237415904.89843675557.37408598546844.13852142421855853.5252935058161288682 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 FORMULA Empirical for column k: k=1: [linear recurrence of order 39] for n>45 EXAMPLE Some solutions for n=1 k=4 ..0..0..1..0..1..0....0..0..1..1..0..2....0..0..1..0..2..1....0..0..1..1..0..0 ..0..1..1..1..1..1....0..0..0..1..0..1....0..0..0..1..0..0....0..1..1..0..0..0 ..0..1..1..1..0..1....0..1..0..0..0..0....0..2..0..0..1..1....0..0..1..0..0..2 CROSSREFS Sequence in context: A075455 A233444 A125015 * A252392 A175915 A098192 Adjacent sequences:  A252394 A252395 A252396 * A252398 A252399 A252400 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 17 2014 STATUS approved

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Last modified June 24 04:38 EDT 2019. Contains 324318 sequences. (Running on oeis4.)