1,2

a(n) = 3^(35n)+5^(21n)+7^(15n) mod 105

a(4)=3^(35*4)+5^(21*4)+7^(15*4) mod 105 = 17 (prime).

Sequence in context: A096629 A020177 A100390 this_sequence A097619 A113709 A076082

Adjacent sequences: A157929 A157930 A157931 this_sequence A157933 A157934 A157935

nonn

Kyle D. Balliet (kdballie(AT)bloomu.edu), Mar 09 2009