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A223424 5X5X5 triangular graph without horizontal edges coloring a rectangular array: number of n X n 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 0
15, 248, 25436, 14270468, 44494633876, 751323264058296, 69480486701806161900, 34690065037599351161239084, 94456106387833550741267252957732, 1387026638297370437542605944364720106044 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223432

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

..1..3..1....7..3..7....7.11..6....7..4..8...11..7..4....8..4..8...11..7.12

..3..7..3....3..7.12...12..7..3....3..1..4....7..4..1....4..2..5....6..3..7

..6..3..7....6.11..7....7.11..7....1..3..1....4..2..0....1..4..8....3..1..4

CROSSREFS

Sequence in context: A163031 A065920 A273624 * A218806 A285395 A331493

Adjacent sequences:  A223421 A223422 A223423 * A223425 A223426 A223427

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2013

STATUS

approved

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Last modified June 1 11:51 EDT 2020. Contains 334762 sequences. (Running on oeis4.)