1,2

Complement of set {A(nonprime number(n)+n)} = {A171504(n)} = {A(A018252(n)+A000027(n))}.

Table of n, a(n) for n=1..50.

Sequence in context: A186499 A187911 A089230 * A098090 A287127 A174681

Adjacent sequences: A171509 A171510 A171511 * A171513 A171514 A171515

nonn

Jaroslav Krizek, Dec 10 2009

approved