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 A223180 Rolling icosahedron footprints: number of n X n 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, vertical or antidiagonal neighbor moves along an icosahedral edge 0
 1, 20, 400, 14560, 1018720, 141047120, 39288329040, 22231433842560, 25710310945249680, 61010814457361940400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A223186 LINKS EXAMPLE Some solutions for n=3 ..0..7..1....0..5..7....0..1..7....0..1..7....0..2..6....0..7..1....0..7.11 ..5..0..7....7..0..1....7..3.11....7..3..1....6..4..2....5..0..7....1..3..7 ..7..1..3....1..7..3...11..7..5....1..8..3....2..6..4....7..5.11....7..1..0 Vertex neighbors: 0 -> 1 2 5 6 7 1 -> 0 2 3 7 8 2 -> 0 1 4 6 8 3 -> 1 7 8 9 11 4 -> 2 6 8 9 10 5 -> 0 6 7 10 11 6 -> 0 2 4 5 10 7 -> 0 1 3 5 11 8 -> 1 2 3 4 9 9 -> 3 4 8 10 11 10 -> 4 5 6 9 11 11 -> 3 5 7 9 10 CROSSREFS Sequence in context: A006494 A007545 A055476 * A041181 A041762 A196740 Adjacent sequences:  A223177 A223178 A223179 * A223181 A223182 A223183 KEYWORD nonn AUTHOR R. H. Hardin Mar 18 2013 STATUS approved

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Last modified January 18 21:54 EST 2019. Contains 319282 sequences. (Running on oeis4.)