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 A221658 Number of 4Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns 0
 0, 40, 2594, 233781, 17254611, 1312503181, 99007036296, 7489842900854 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 4 of A221655 LINKS EXAMPLE Some solutions for n=3 ..1..2..1....0..2..1....0..2..1....0..2..1....0..2..1....1..2..0....1..0..0 ..0..2..0....0..3..1....0..1..1....0..2..1....0..3..0....0..3..0....1..4..1 ..0..0..1....1..1..0....1..4..0....0..2..1....1..1..0....1..1..1....0..2..0 ..1..4..0....0..2..1....0..1..1....1..2..0....2..2..0....0..2..1....1..2..0 CROSSREFS Sequence in context: A003741 A263553 A049215 * A188154 A268151 A269824 Adjacent sequences:  A221655 A221656 A221657 * A221659 A221660 A221661 KEYWORD nonn AUTHOR R. H. Hardin Jan 21 2013 STATUS approved

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Last modified January 22 15:13 EST 2022. Contains 350481 sequences. (Running on oeis4.)