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 A222511 Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
 0, 4, 4, 15, 35, 170, 441, 2192, 5416, 26660, 66209, 328121, 816736, 4074688, 10172187, 51053330, 127212627, 643151980, 1598614930, 8135779154, 20183768037, 103256080822, 255983883834, 1314494576457, 3259213240495, 16780895442470 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A222509 LINKS R. H. Hardin, Table of n, a(n) for n = 1..77 EXAMPLE All solutions for n=3 ..0..0..0....0..0..0....0..1..0....0..0..0 ..1..0..0....0..0..1....1..1..1....0..0..0 ..0..0..0....0..0..0....1..1..1....1..0..1 CROSSREFS Sequence in context: A068592 A198313 A219350 * A135944 A268169 A177241 Adjacent sequences: A222508 A222509 A222510 * A222512 A222513 A222514 KEYWORD nonn AUTHOR R. H. Hardin Feb 23 2013 STATUS approved

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Last modified May 19 20:30 EDT 2024. Contains 372703 sequences. (Running on oeis4.)