1,1

a(n)=A001414(A014574(n)).

Table of n, a(n) for n=1..67.

12th twin prime pair = (A001359(12), A006512(12)) = (149,151), hence A014574(12) = 150 = 2*3*5*5, therefore a(12) = 2+3+5+5 = 15.

Cf. A078576, A078575, A078571.

Sequence in context: A202186 A247467 A032728 * A225387 A037259 A219115

Adjacent sequences: A078574 A078575 A078576 * A078578 A078579 A078580

nonn

Reinhard Zumkeller, Nov 29 2002

approved