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A251999 Number of (n+2)X(7+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7 1
173871388, 79312163374, 40596220326266, 20811403922202520, 10674144780289546954, 5477004140225156474736, 2810624107790172363233942, 1442327760209164035443021466, 740159863895738957327641607158 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A252000

LINKS

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

EXAMPLE

Some solutions for n=1

..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0

..0..0..0..0..0..3..0..3..0....0..3..0..0..0..0..3..0..3

..0..0..3..3..0..3..3..0..3....0..0..0..3..0..3..3..0..3

CROSSREFS

Sequence in context: A233598 A187316 A306875 * A003850 A003843 A093047

Adjacent sequences:  A251996 A251997 A251998 * A252000 A252001 A252002

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 12 2014

STATUS

approved

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Last modified August 12 00:34 EDT 2022. Contains 356067 sequences. (Running on oeis4.)