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 A220457 Equals one maps: number of n X 3 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, vertical and antidiagonal neighbors in a random 0..1 n X 3 array. 1
 4, 22, 108, 691, 3872, 20897, 112582, 605780, 3249132, 17400206, 93125105, 498148634, 2663790130, 14241169579, 76125716517, 406890173406, 2174685548474, 11622471918192, 62113961444133, 331949857443568, 1773988622548460 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A220461. LINKS R. H. Hardin, Table of n, a(n) for n = 1..115 EXAMPLE Some solutions for n=3 ..1..1..1....0..0..0....0..0..0....1..0..0....1..1..1....0..0..0....1..0..1 ..0..0..1....0..0..0....1..1..0....1..0..1....0..0..1....0..0..1....1..0..1 ..0..1..1....0..0..1....1..1..0....0..0..1....1..0..1....0..1..0....1..0..1 CROSSREFS Cf. A220461. Sequence in context: A001436 A224243 A024420 * A108840 A007994 A006651 Adjacent sequences: A220454 A220455 A220456 * A220458 A220459 A220460 KEYWORD nonn AUTHOR R. H. Hardin, Dec 15 2012 STATUS approved

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Last modified March 1 08:46 EST 2024. Contains 370430 sequences. (Running on oeis4.)