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 A204373 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..1 introduced in row major order 0
 33, 48, 61, 87, 136, 217, 347, 560, 901, 1455, 2352, 3801, 6147, 9944, 16085, 26023, 42104, 68121, 110219, 178336, 288549, 466879, 755424, 1222297, 1977715 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A204381 LINKS EXAMPLE Some solutions for n=3 ..0..0..0..0..0....0..0..0..1..0....0..0..0..1..0....0..0..0..0..0 ..1..1..1..1..1....1..1..1..1..1....1..1..1..1..1....1..1..1..1..1 ..0..0..0..0..0....1..1..1..1..1....1..1..1..1..1....0..0..0..0..0 ..1..1..1..1..1....1..0..0..0..0....0..0..0..0..0....0..0..0..0..0 ..0..0..0..0..0....1..1..1..1..1....0..0..0..0..0....0..1..1..1..1 CROSSREFS Sequence in context: A179244 A258698 A258697 * A111502 A080933 A328247 Adjacent sequences: A204370 A204371 A204372 * A204374 A204375 A204376 KEYWORD nonn AUTHOR R. H. Hardin Jan 14 2012 STATUS approved

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Last modified March 30 07:38 EDT 2023. Contains 361606 sequences. (Running on oeis4.)