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A252588 Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 1 2 7 8 or 9 1
139918, 2932278, 78789896, 2038097660, 52624335712, 1370922407174, 35735322887730, 930740577933920, 24247004430527392, 631716074423441952, 16457840384549796568, 428769370694546606722, 11170597669299648915900 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A252590

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A206748 A018234 A179583 * A252902 A242143 A156409

Adjacent sequences:  A252585 A252586 A252587 * A252589 A252590 A252591

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2014

STATUS

approved

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Last modified May 9 10:25 EDT 2021. Contains 343732 sequences. (Running on oeis4.)