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 A222680 Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
 2, 1, 5, 10, 25, 150, 359, 2249, 6511, 39991, 119033, 747758, 2254819, 14115927, 43486517, 268330409, 844434635, 5129191736, 16468845241, 98454511005, 322307191185, 1896450581728, 6325288982445, 36644084370361, 124416281370753 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A222679 LINKS R. H. Hardin, Table of n, a(n) for n = 1..45 EXAMPLE All solutions for n=3 ..0..1..1....0..0..0....0..0..1....0..0..0....0..0..0 ..1..1..1....0..0..0....0..0..0....0..0..1....1..0..0 CROSSREFS Sequence in context: A226311 A049948 A222574 * A110352 A107310 A277279 Adjacent sequences:  A222677 A222678 A222679 * A222681 A222682 A222683 KEYWORD nonn AUTHOR R. H. Hardin Feb 28 2013 STATUS approved

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Last modified December 6 06:14 EST 2021. Contains 349563 sequences. (Running on oeis4.)