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A223485 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 or antidiagonal neighbor moves across an icosahedral edge 1
64000000, 1594323, 102515625, 6591796875, 563999907825, 48783753036675, 4468456626780825, 409807503225524475, 38120535124295537025, 3545335226678204077875, 330863549667143315488425 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A223480

LINKS

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

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

..0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..4

..0..5..7....4..1..4....4..1..6....4..1..4....6..1..4....4..1..6....4.17..4

..7..5..7....6..1..0....6..7..5....6..1..6....6..1..6....0..1..4....4..3.16

..9..5..7....0..5..9...11..7.11....0..1..0....0..1..0....4.17.18....2..3..4

..0..5..9....9.14.11...11.12.10....6..1..0....0..5..9....4.17.10...16..3..2

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: A217937 A203932 A223288 * A250863 A164725 A164726

Adjacent sequences:  A223482 A223483 A223484 * A223486 A223487 A223488

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2013

STATUS

approved

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Last modified July 25 20:59 EDT 2021. Contains 346294 sequences. (Running on oeis4.)