1,3

a(p+1) = p, p is a prime.

If n is prime and 2n-3 is not prime, then a(n) = 0. - David Wasserman, Jan 27 2005

Table of n, a(n) for n=1..68.

a(10) = 9 + 7 + 3 = 19.

Sequence in context: A045790 A085102 A087572 * A241082 A219789 A034694

Adjacent sequences: A085104 A085105 A085106 * A085108 A085109 A085110

nonn

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 04 2003

More terms from David Wasserman, Jan 27 2005

approved