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 A222347 Number of (n+3)X1 arrays of occupancy after each element moves up to +-n places including 0 0
 21, 108, 440, 1690, 6405, 24276, 92340, 352674, 1352032 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A222345 LINKS EXAMPLE Some solutions for n=3 ..1....2....0....0....2....3....0....0....1....2....1....0....0....2....1....0 ..1....0....2....1....1....2....0....0....1....3....1....1....3....2....3....1 ..1....0....0....3....1....0....0....4....2....1....0....0....0....0....1....2 ..1....4....1....2....1....0....6....0....1....0....1....0....1....2....0....0 ..0....0....3....0....0....0....0....1....0....0....1....2....0....0....1....2 ..2....0....0....0....1....1....0....1....1....0....2....3....2....0....0....1 CROSSREFS Sequence in context: A041854 A219820 A071333 * A039611 A069307 A157886 Adjacent sequences:  A222344 A222345 A222346 * A222348 A222349 A222350 KEYWORD nonn AUTHOR R. H. Hardin Feb 16 2013 STATUS approved

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Last modified October 23 22:10 EDT 2019. Contains 328373 sequences. (Running on oeis4.)