A223431 5X5X5 triangular graph without horizontal edges coloring a rectangular array: number of nX7 0..14 arrays where 0..14 label nodes of a graph with edges 0,1 0,2 1,3 1,4 2,4 2,5 3,6 3,7 4,7 4,8 5,8 5,9 6,10 6,11 7,11 7,12 8,12 8,13 9,13 9,14 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph

10052, 3613024, 1575629948, 707293805988, 325249041493488, 149616234350273816, 69480486701806161900, 32146056288289912125792, 14967181981562004391914308, 6936817035714720741320651808

Offset

1,1

Comments

Column 7 of A223432

Links

R. H. Hardin, Table of n, a(n) for n = 1..147

Example

Some solutions for n=3
..0..1..3..1..0..1..4....0..1..3..1..4..7..4....0..1..3..1..3..6..3
..1..0..1..0..1..4..8....1..0..1..4..7.12..7....1..0..1..3..7..3..7
..0..1..0..2..4..2..4....0..1..0..2..4..7.11....0..1..0..1..3..7..3

Crossrefs

Sequence in context: A374372 A188663 A250711 * A203089 A187113 A023356

Adjacent sequences: A223428 A223429 A223430 * A223432 A223433 A223434

Keyword

nonn

Author

R. H. Hardin Mar 20 2013

Status

approved