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A251843 Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime 1
1951, 5438, 21748, 48692, 277125, 1226031, 2726048, 16168331, 74290304, 163730464, 998856517, 4693337366, 10286321048, 63845445267, 303868751600, 663861257682, 4160750200373, 19942932871102, 43493338467394 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A251845

LINKS

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

FORMULA

Empirical: a(n) = 123*a(n-3) -4692*a(n-6) +69631*a(n-9) -514311*a(n-12) +2250027*a(n-15) -6529710*a(n-18) +13126892*a(n-21) -18315243*a(n-24) +17438687*a(n-27) -11035045*a(n-30) +4492984*a(n-33) -1153262*a(n-36) +193456*a(n-39) -19536*a(n-42) for n>50

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A235003 A223464 A252062 * A249202 A249324 A249217

Adjacent sequences:  A251840 A251841 A251842 * A251844 A251845 A251846

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 09 2014

STATUS

approved

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Last modified August 10 04:38 EDT 2020. Contains 336368 sequences. (Running on oeis4.)