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 A222879 Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
 2, 11, 122, 1814, 26311, 399849, 6013669, 91842381, 1400573929, 21492587457, 330100781811, 5085688832352, 78450837933529, 1212393597214424, 18758126651572197, 290589347000277975, 4505965014075887115 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A222878 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for n=3 ..0..0..1....0..1..2....0..1..2....0..1..1....0..1..2....0..0..1....0..1..2 ..0..2..3....2..1..3....1..0..2....0..1..0....3..0..1....2..3..2....2..2..3 CROSSREFS Sequence in context: A346650 A251663 A118794 * A247736 A155928 A001946 Adjacent sequences:  A222876 A222877 A222878 * A222880 A222881 A222882 KEYWORD nonn AUTHOR R. H. Hardin Mar 08 2013 STATUS approved

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Last modified May 18 08:03 EDT 2022. Contains 353785 sequences. (Running on oeis4.)