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 A241398 Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4 1
 3, 5, 9, 23, 44, 93, 204, 368, 761, 1583, 2951, 6056, 12244, 23588, 47945, 95715, 187731, 378531, 752679, 1489014, 2986657, 5934705, 11787915, 23567455, 46847503, 93218990, 186017656, 369978815, 736728537, 1468604461, 2922396725, 5820645191 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A241397 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 2*a(n-2) +8*a(n-3) -a(n-4) -10*a(n-5) -18*a(n-6) +8*a(n-7) +20*a(n-8) +20*a(n-9) -24*a(n-10) -22*a(n-11) -a(n-12) +32*a(n-13) +8*a(n-14) -3*a(n-15) -12*a(n-16) +4*a(n-17) -5*a(n-18) -4*a(n-20) -3*a(n-21) +2*a(n-22) for n>23 EXAMPLE Some solutions for n=4 ..3..2..2..2....2..3..2..2....3..2..3..2....2..3..3..2....3..2..3..3 ..2..0..1..0....2..1..0..0....2..1..1..2....2..1..1..2....1..2..1..2 CROSSREFS Sequence in context: A147038 A146275 A089636 * A262483 A083366 A006722 Adjacent sequences:  A241395 A241396 A241397 * A241399 A241400 A241401 KEYWORD nonn AUTHOR R. H. Hardin, Apr 20 2014 STATUS approved

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Last modified October 23 16:53 EDT 2018. Contains 316529 sequences. (Running on oeis4.)