A152527 a(n) = (p(n)*p(n+1)-p(n+2))/2, where p(n) is the n-th odd prime.

4, 12, 32, 63, 101, 150, 204, 318, 431, 553, 737, 858, 984, 1216, 1533, 1766, 2008, 2342, 2552, 2842, 3234, 3645, 4266, 4847, 5148, 5456, 5775, 6095, 7110, 8250, 8904, 9447, 10280, 11171, 11772, 12712, 13524, 14356, 15393, 16104

Offset: 1

Author

Omar E. Pol, Dec 06 2008

Keywords

• easy
• nonn

Crossrefs

Cf. A065091, A111071, A152528, A152529, A152530, A152531, A152532.

Programs

Maple

A152527 := proc(n)
    j := n+1 ;
    ithprime(j)*ithprime(j+1)-ithprime(j+2) ;
    %/2 ;
end proc: # R. J. Mathar, Jul 28 2015

Formula

a(n) = A111071(n+1)/2.