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 A240291 Number of nX3 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4 1
 8, 26, 206, 974, 8064, 38252, 316962, 1502948, 12468758, 59122266, 490548594, 2326075252, 19300603720, 91520046552, 759392572070, 3600913438102, 29878821186710, 141680483207634, 1175603702913842, 5574521174572456 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A240295 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 63*a(n-2) -1109*a(n-4) +7143*a(n-6) -395*a(n-8) -201246*a(n-10) +762860*a(n-12) +347011*a(n-14) -7366154*a(n-16) +11744674*a(n-18) +3758987*a(n-20) +10095295*a(n-22) -126415852*a(n-24) +204390541*a(n-26) -65238786*a(n-28) -59211883*a(n-30) -114625640*a(n-32) +381020006*a(n-34) -342073760*a(n-36) +16725276*a(n-38) +181283664*a(n-40) -110895680*a(n-42) +16492080*a(n-44) +1175136*a(n-46) +390464*a(n-48) for n>50 EXAMPLE Some solutions for n=4 ..3..1..1....1..3..1....3..1..1....3..1..3....1..3..3....3..1..3....3..1..3 ..3..2..2....1..0..0....3..2..2....3..0..2....1..2..0....3..0..0....3..2..0 ..1..3..2....1..2..2....3..2..0....3..2..2....3..2..2....1..0..3....1..0..2 ..3..1..1....3..2..3....1..0..0....1..2..0....1..3..2....3..2..2....3..2..0 CROSSREFS Sequence in context: A223312 A194997 A089064 * A203635 A000810 A171740 Adjacent sequences:  A240288 A240289 A240290 * A240292 A240293 A240294 KEYWORD nonn AUTHOR R. H. Hardin, Apr 03 2014 STATUS approved

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Last modified August 18 02:34 EDT 2022. Contains 356204 sequences. (Running on oeis4.)