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A251975 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not 0 1 2 7 8 or 9 and every diagonal and antidiagonal sum 0 1 2 7 8 or 9 0
2930, 73222, 4379034, 153525420, 10630171636, 2806746475910, 692955339504464, 209434649520543432, 151587445464265847714, 156011993747327666271372, 207178956167624219233265502 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251983

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A251233 A251983 A251976 * A252198 A236648 A236196

Adjacent sequences:  A251972 A251973 A251974 * A251976 A251977 A251978

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 12 2014

STATUS

approved

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Last modified January 29 14:07 EST 2020. Contains 331338 sequences. (Running on oeis4.)