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A223288 Rolling icosahedron face footprints: number of 7Xn 0..19 arrays starting with 0 where 0..19 label faces of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves across an icosahedral edge 1
64000000, 46875, 7740273, 221142771, 22392745881, 895927195659, 72981761306721, 3419190010701027, 246223435310438889, 12650585205686219643, 846009017331144444849, 45987344869442894841555, 2939800653860874208317369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A223282

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..32

EXAMPLE

Some solutions for n=3

..0..5..0....0..5..0....0..5..0....0..5..0....0..5..0....0..5..0....0..5..0

..0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0

..4..1..4....4..1..0....6..1..0....0..5..0....0..5..0....0..2..0....6..1..4

..0..1..0....4..1..0....0..1..6....0..5..0....9..5..7....0..2..8....0..1..0

..0..1..0....0..1..0....6..1..6....0..5..0....9..5..7....8..2..8....0..1..4

..0..1..0....0..2..0....4..1..6....7..5..9....0..5..0....8.13..8....0..1..4

..6..1..4....0..2..3....6..1..6....7..5..7....9..5..9...16.13..8....6..1..0

Face neighbors:

0 -> 1 2 5

1 -> 0 4 6

2 -> 0 3 8

3 -> 2 4 16

4 -> 3 1 17

5 -> 0 7 9

6 -> 1 7 10

7 -> 6 5 11

8 -> 2 9 13

9 -> 8 5 14

10 -> 6 12 17

11 -> 7 12 14

12 -> 11 10 19

13 -> 8 15 16

14 -> 9 11 15

15 -> 14 13 19

16 -> 3 13 18

17 -> 4 10 18

18 -> 16 17 19

19 -> 15 18 12

CROSSREFS

Sequence in context: A116499 A217937 A203932 * A223485 A250863 A348276

Adjacent sequences:  A223285 A223286 A223287 * A223289 A223290 A223291

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 19 2013

STATUS

approved

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Last modified June 24 20:32 EDT 2022. Contains 354830 sequences. (Running on oeis4.)