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A252367 Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7 1
3188, 17340, 124538, 818040, 5340334, 35124242, 230366506, 1511215256, 9934409558, 65227813792, 428045543104, 2810372935518, 18454316847202, 121160816335182, 795445333429948, 5222481881638938, 34288545449387208 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A252369

LINKS

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

R. H. Hardin, Empirical recurrence of order 71

FORMULA

Empirical recurrence of order 71 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A324634 A115932 A187936 * A250386 A069401 A225056

Adjacent sequences:  A252364 A252365 A252366 * A252368 A252369 A252370

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2014

STATUS

approved

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Last modified May 27 02:54 EDT 2019. Contains 323597 sequences. (Running on oeis4.)