A223238 Rolling icosahedron footprints: number of 6Xn 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an icosahedral edge

248832, 1856465, 842416625, 146259564725, 42210625593305, 9343721361109325, 2410480042269361205, 569856683384487837845, 141861478546517230929185, 34264186727962091778301265, 8425769874595179617059603645

Offset

1,1

Comments

Row 6 of A223233

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

Example

Some solutions for n=3
..0..6..0....0..6..0....0..6..0....0..6..0....0..6..0....0..6..0....0..6..0
..0..6..0....0..6..0....0..6..0....0..6..0....0..6..0....0..6..0....0..6..0
..2..6..0....0..6..0....0..6..0....0..6..0....2..6..0....4..6..0....2..6..0
..0..6.10....0..7..5....0..5.10....2..1..0....4..6..4....4..2..0....0..6..2
.10..6.10....0..6..0...11..5.11....8..1..0....4..6..5....8..2..6....4..6..5
.10..4..2....0..7..0...11..5..6....8..1..0....5..6.10....1..2..1....4..6.10
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: A229872 A172796 A268842 * A017405 A109691 A017525

Adjacent sequences: A223235 A223236 A223237 * A223239 A223240 A223241

Keyword

nonn

Author

R. H. Hardin Mar 18 2013

Status

approved