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A216691
Number of horizontal, vertical, diagonal or knight-move neighbor colorings of an nX2 array with new integer colors introduced in row major order
0
1, 2, 9, 90, 1451, 33694, 1047754, 41569451, 2033056870, 119455094071, 8265294573126, 662782941109746, 60794941081100523, 6309797655336714672
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 2 of A216694
LINKS
Table of n, a(n) for n=1..14.
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..2....2..3....2..3....1..2....2..3....1..2....2..3....2..3....2..3....2..3
..3..4....4..5....3..4....0..3....0..1....3..4....3..4....4..5....3..4....3..4
..1..5....6..7....4..5....3..2....4..3....1..0....0..1....6..1....5..6....5..1
CROSSREFS
Sequence in context: A001192 A006120 A012941 * A059477 A136553 A266293
Adjacent sequences: A216688 A216689 A216690 * A216692 A216693 A216694
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 14 2012
STATUS
approved

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Last modified November 7 08:07 EST 2024. Contains 377523 sequences.
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