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 A240297 Number of 3Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4 1
 4, 24, 206, 1322, 9970, 63892, 459420, 2983714, 21011004, 138067258, 960196414, 6366988610, 43918588986, 293115852448, 2010639717594, 13480363485774, 92114886446716, 619546400267578, 4222299248961016, 28460962259793426 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A240295 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 80 FORMULA Empirical recurrence of order 80 (see link above) EXAMPLE Some solutions for n=4 ..3..1..1..3....1..3..3..0....3..1..3..1....3..0..0..1....3..1..3..0 ..3..0..0..0....1..2..0..0....3..2..2..2....3..0..1..1....3..0..2..3 ..3..2..2..2....3..2..3..3....1..2..0..2....1..0..0..2....3..0..0..0 CROSSREFS Sequence in context: A089946 A012244 A240429 * A050388 A241980 A297218 Adjacent sequences:  A240294 A240295 A240296 * A240298 A240299 A240300 KEYWORD nonn AUTHOR R. H. Hardin, Apr 03 2014 STATUS approved

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Last modified April 24 10:11 EDT 2019. Contains 322420 sequences. (Running on oeis4.)