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A252045 Number of (n+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 1 3 6 or 8 and every diagonal and antidiagonal sum 1 3 6 or 8. 1
1552, 2454, 2674, 6562, 53346, 233342, 658902, 16790430, 127185206, 456725582, 51136630446, 621643287922, 2444602604514, 1337470437403802, 25734548246817278, 104979871659360990, 256731178514562552110 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252053.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..18

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A252053.

Sequence in context: A252403 A252053 A252046 * A184683 A235306 A203501

Adjacent sequences:  A252042 A252043 A252044 * A252046 A252047 A252048

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 13 2014

STATUS

approved

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Last modified October 20 05:54 EDT 2021. Contains 348099 sequences. (Running on oeis4.)