A157742 - OEIS

%I #3 Mar 30 2012 18:52:03

%S 8,5,8,5,8,5,1,8,4,5,8,5,7,4,8,1,5,8,7,5,7,2,5,8,5,8,5,5,5,1,8,2,8,1,

%T 4,5,1,7,8,2,8,5,8,4,1,5,8,5,4,8,2,4,1,7,8,7,5,8,2,5,5,8,5,5,1,2,8,5,

%U 7,2,1,4,5,1,2,5,2,2,8,2,8,7,5,7,2,5,8,5,7,2,5,2,5,4,4,8,1,7,2,4,1,8,4,2,7

%N A006094(n+3) mod 9.

%C Values of 0, 3 or 6 are obviously absent, because that would indicate divisibility by 3 which does not happen for prime products involving primes >3.

%F a(n) = A038194(n+3)*A038194(n+4) mod 9.

%K nonn,easy

%O 0,1

%A _Paul Curtz_, Mar 05 2009

%E Edited by _R. J. Mathar_, Apr 01 2009