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 A252075 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4 9
 92, 105, 105, 183, 152, 183, 375, 419, 419, 375, 767, 1135, 1497, 1135, 767, 1573, 3029, 5085, 5085, 3029, 1573, 3279, 8352, 17455, 21862, 17455, 8352, 3279, 6994, 23091, 60245, 92225, 92225, 60245, 23091, 6994, 15046, 63460, 206747, 391934, 480464 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....92....105.....183.......375........767........1573.........3279 ...105....152.....419......1135.......3029........8352........23091 ...183....419....1497......5085......17455.......60245.......206747 ...375...1135....5085.....21862......92225......391934......1669294 ...767...3029...17455.....92225.....480464.....2547765.....13460641 ..1573...8352...60245....391934....2547765....16789564....110131513 ..3279..23091..206747...1669294...13460641...110131513....896763044 ..6994..63460..711749...7114867...71027923...722619033...7301549024 .15046.174704.2455039..30309042..375675345..4749948377..59570598626 .32452.481577.8451165.129016031.1985308056.31181555206.485457428288 LINKS R. H. Hardin, Table of n, a(n) for n = 1..391 FORMULA Empirical for column k: k=1: [linear recurrence of order 12] for n>14 k=2: [order 9] for n>11 k=3: [order 16] for n>18 k=4: [order 24] for n>26 k=5: [order 44] for n>46 k=6: [order 72] for n>74 EXAMPLE Some solutions for n=4 k=4 ..2..1..2..2..2..1....2..2..2..2..2..2....2..2..1..2..2..2....1..2..2..2..1..2 ..1..2..2..2..2..2....2..1..2..2..2..2....2..2..2..2..2..2....2..2..2..2..2..1 ..2..2..2..2..2..2....2..2..2..2..1..2....2..1..2..2..2..2....2..1..2..2..2..2 ..2..2..2..2..2..2....2..2..2..2..2..2....2..2..2..2..1..2....2..2..2..2..2..2 ..2..1..2..2..1..2....2..2..2..2..2..2....1..2..2..2..2..2....1..2..2..2..2..2 ..2..2..2..2..2..2....2..2..2..2..2..1....2..2..2..1..2..2....2..1..2..2..2..1 CROSSREFS Sequence in context: A057702 A039549 A101287 * A065511 A252068 A046116 Adjacent sequences: A252072 A252073 A252074 * A252076 A252077 A252078 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 13 2014 STATUS approved

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Last modified February 8 08:49 EST 2023. Contains 360138 sequences. (Running on oeis4.)