OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..2000
EXAMPLE
a(1) = 44; 44*12+1=529, 44*12+5=533, 44*12+7=535, 44*12+11=539, and 529, 533, 535 and 539 are all composites.
MATHEMATICA
Select[Range[500], AllTrue[12#+{1, 5, 7, 11}, CompositeQ]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 13 2018 *)
PROG
(PARI)
for(i=0, 1000, if(!isprime(12*i+1) && !isprime(12*i+5) && !isprime(12*i+7) && !isprime(12*i+11), print1(i", "))) \\ Lear Young, May 16 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Lear Young, May 16 2014
STATUS
approved