A268123 - OEIS

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A268123

Number of 7Xn arrays containing n copies of 0..7-1 with every element equal to or 1 greater than any north or west neighbors modulo 7 and the upper left element equal to 0.

1, 2, 5, 15, 67, 457, 9204, 586844, 36708187, 1582675968, 49970797654, 1250823466190

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Row 7 of A268115.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=8

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

..0..0..1..1..2..3..4..5....0..1..2..2..2..3..4..5....0..1..1..2..3..4..5..6

..0..1..1..2..3..4..5..6....0..1..2..3..3..4..5..5....0..1..2..3..4..5..5..6

..1..2..2..3..4..5..5..6....1..1..2..3..4..5..6..6....1..1..2..3..4..5..6..0

..2..2..3..4..5..6..6..6....1..2..3..4..4..5..6..6....2..2..3..4..5..6..6..0

..2..3..4..4..5..6..6..0....2..3..4..5..5..6..0..0....2..3..4..4..5..6..0..1

..3..3..4..5..5..6..0..1....3..4..5..6..6..6..0..0....2..3..4..5..6..6..0..1

CROSSREFS

Cf. A268115.

Sequence in context: A031154 A270534 A268116 * A158079 A090091 A268122

Adjacent sequences: A268120 A268121 A268122 * A268124 A268125 A268126

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2016

STATUS

approved