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A203926 Number of (n+1)X(n+1) 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 0
396, 106596, 140120856, 1012872412476, 41849462653189056, 10145256726122341001496 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A203934

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A092720 A230732 A034621 * A270842 A074483 A023326

Adjacent sequences:  A203923 A203924 A203925 * A203927 A203928 A203929

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 08 2012

STATUS

approved

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Last modified October 17 01:03 EDT 2019. Contains 328103 sequences. (Running on oeis4.)