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 A221634 Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 3Xn array 1
 1, 38, 395, 3848, 32149, 261182, 2095293, 16774816, 134213444, 1073737004, 8589926161, 68719468238, 549755798961, 4398046497376, 35184372064343, 281474976689834, 2251799813647324, 18014398509451874, 144115188075799743 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A221632 LINKS R. H. Hardin, Table of n, a(n) for n = 1..76 EXAMPLE Some solutions for n=3 ..1..1..0....0..0..0....1..1..0....1..0..1....1..0..0....0..0..1....0..0..0 ..0..0..0....1..1..0....0..1..1....0..0..0....1..0..0....0..0..0....1..0..0 ..0..0..0....0..1..1....0..0..0....0..0..1....0..0..1....1..0..1....1..1..1 CROSSREFS Sequence in context: A187078 A155193 A159943 * A251056 A267474 A240258 Adjacent sequences: A221631 A221632 A221633 * A221635 A221636 A221637 KEYWORD nonn AUTHOR R. H. Hardin Jan 21 2013 STATUS approved

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Last modified March 31 11:51 EDT 2023. Contains 361648 sequences. (Running on oeis4.)