A223262 Rolling icosahedron footprints: number of nX7 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal or vertical neighbor moves along an icosahedral edge

15625, 24134045, 39655444525, 66349405785905, 111705181963446505, 188499365751451987865, 318367455270147525993445, 537892337767667036882186525, 908907301291035542721838482085

Offset

1,1

Comments

Column 7 of A223263

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..0..6..0..6..0..2..1....0..6..0..6..5.11..7....0..6..0..6..0..2..1
..6..0..6..0..2..1..8....6..0..6..0..7..5..0....6..0..6..0..7..0..2
..0..6..0..1..0..2..4....0..6..0..6..5..0..7....0..6..0..1..0..1..8
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: A017334 A265934 A017454 * A017586 A223320 A222280

Adjacent sequences: A223259 A223260 A223261 * A223263 A223264 A223265

Keyword

nonn

Author

R. H. Hardin Mar 19 2013

Status

approved