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A203885 Number of (n+1)X7 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 0
236513641, 195759462871, 209668438383145, 247090069595954263, 300614697430789927465 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A203887

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A322061 A029831 A289981 * A335591 A234058 A064869

Adjacent sequences:  A203882 A203883 A203884 * A203886 A203887 A203888

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 2012

STATUS

approved

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Last modified November 27 01:16 EST 2021. Contains 349344 sequences. (Running on oeis4.)