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A251949 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime 1
12344, 14434, 47034, 177132, 875435, 3678858, 14138322, 70829204, 294856410, 1132100600, 5720636445, 23687141361, 90900692009, 462774737917, 1906148073563, 7312836167224, 37500163312746, 153668705714219 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A251950
LINKS
FORMULA
Empirical: a(n) = 154*a(n-3) -5851*a(n-6) +20097*a(n-9) -2014075*a(n-12) +7661518*a(n-15) -279463775*a(n-18) +1535608544*a(n-21) -24406354757*a(n-24) +118022364813*a(n-27) -1198422975794*a(n-30) +5253067376608*a(n-33) -26520258978850*a(n-36) +18073989300491*a(n-39) +96342732311249*a(n-42) -85995203746185*a(n-45) -170686132175553*a(n-48) +197348338065285*a(n-51) +96194105455683*a(n-54) -229576602578095*a(n-57) +33338181294725*a(n-60) +167708446768799*a(n-63) -48354669647692*a(n-66) -78886922607089*a(n-69) +8621638722623*a(n-72) +14516483555412*a(n-75) +3607004446108*a(n-78) +110670492672*a(n-81) +5285524456*a(n-84) +3437744880*a(n-87) -46166400*a(n-90) for n>95
EXAMPLE
Some solutions for n=4
..2..0..0..2..0..0..2..3..0....1..1..3..1..1..3..1..1..3
..0..1..1..0..1..1..0..1..1....0..0..2..0..0..2..0..0..2
..0..1..1..0..1..1..0..1..1....1..1..0..1..1..0..1..1..0
..2..0..0..2..0..0..2..0..0....1..1..0..1..1..0..1..1..0
..0..1..1..0..1..1..0..1..1....0..0..2..0..0..2..3..0..2
..3..1..1..3..1..1..0..1..1....1..1..0..1..1..0..1..1..0
CROSSREFS
Sequence in context: A248717 A184472 A350153 * A178475 A104972 A193493
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 11 2014
STATUS
approved

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Last modified March 19 07:49 EDT 2024. Contains 370958 sequences. (Running on oeis4.)