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A252073 Number of (n+2)X(6+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4 1
1573, 8352, 60245, 391934, 2547765, 16789564, 110131513, 722619033, 4749948377, 31181555206, 204626875063, 1343622742626, 8822820748320, 57923805951945, 380282422081555, 2496764092390189, 16392666023439258, 107625734028805523 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A252075

LINKS

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

R. H. Hardin, Empirical recurrence of order 72

FORMULA

Empirical recurrence of order 72 (see link above)

EXAMPLE

Some solutions for n=3

..1..2..2..2..1..2..2..1....2..1..2..2..2..2..1..2....1..2..2..2..2..2..2..2

..2..2..1..2..2..2..2..2....1..2..2..2..1..2..2..2....2..2..2..2..2..2..2..1

..2..2..2..2..2..2..2..2....2..2..2..2..2..2..2..2....2..2..2..1..2..2..2..2

..2..1..2..2..2..2..2..2....2..2..2..1..2..2..2..2....2..2..2..2..2..2..2..2

..2..2..2..2..2..2..1..2....1..2..2..2..2..2..2..2....2..2..2..2..1..2..2..1

CROSSREFS

Sequence in context: A260144 A221105 A236261 * A202465 A045291 A125014

Adjacent sequences:  A252070 A252071 A252072 * A252074 A252075 A252076

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 13 2014

STATUS

approved

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Last modified May 18 19:58 EDT 2021. Contains 344002 sequences. (Running on oeis4.)