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A268121 Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north or west neighbors modulo 5 and the upper left element equal to 0. 0
1, 2, 5, 15, 111, 1687, 23522, 253472, 2290853, 18470974, 140294987, 1065068657, 8679331941, 80007298457, 822840131716, 8854238260868, 94125422868108, 961136731712639, 9379785431020093 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A268115.

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

Some solutions for n=6

..0..1..1..2..3..3....0..1..1..2..3..4....0..1..2..2..3..4....0..1..1..2..3..4

..0..1..2..2..3..4....0..1..2..3..4..0....1..1..2..3..4..0....0..1..2..2..3..4

..0..1..2..3..4..0....1..1..2..3..4..0....1..2..3..4..4..0....0..1..2..3..3..4

..1..2..3..4..4..0....1..2..3..3..4..0....2..3..4..0..0..1....0..1..2..3..4..0

..1..2..3..4..4..0....2..2..3..4..4..0....3..3..4..0..1..2....1..2..3..4..4..0

CROSSREFS

Cf. A268115.

Sequence in context: A191477 A196196 A266573 * A306794 A111790 A248125

Adjacent sequences:  A268118 A268119 A268120 * A268122 A268123 A268124

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2016

STATUS

approved

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Last modified May 21 01:26 EDT 2019. Contains 323429 sequences. (Running on oeis4.)