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A215955 Number of horizontal, vertical and diagonal neighbor colorings of the even squares of an nX4 array with new integer colors introduced in row major order 1
1, 4, 29, 313, 6150, 145563, 5219070, 208181894, 11412814314, 670592486703, 51088102234508, 4085932956830052, 407520605922011467, 42123055901071684382, 5279748839226156263229, 679936583636831702045901 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A215959

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=4

..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x

..x..2..x..3....x..1..x..0....x..1..x..2....x..2..x..3....x..2..x..3

..4..x..0..x....2..x..3..x....3..x..4..x....2..x..4..x....2..x..0..x

..x..1..x..2....x..4..x..2....x..5..x..1....x..3..x..5....x..0..x..2

CROSSREFS

Sequence in context: A303928 A201627 A195194 * A295237 A028853 A118795

Adjacent sequences:  A215952 A215953 A215954 * A215956 A215957 A215958

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 28 2012

STATUS

approved

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Last modified January 27 06:18 EST 2022. Contains 350601 sequences. (Running on oeis4.)