A152529 a(n) = (p(n)*p(n+2) - 3*p(n+1))/2, where p(n) is the n-th odd prime.

3, 17, 29, 74, 98, 167, 241, 313, 490, 580, 734, 899, 1069, 1307, 1528, 1885, 2065, 2339, 2695, 2911, 3391, 3892, 4349, 4844, 5249, 5453, 5882, 6752, 7211, 8503, 8899, 9998, 10271, 11470, 12071, 12865, 13849, 14687, 15388, 16823

Offset: 1

Author

Omar E. Pol, Dec 06 2008

Keywords

• easy
• nonn

Crossrefs

Cf. A065091, A111071, A152527, A152528, A152530, A152531, A152532.

Programs

Maple

A152529 := proc(n)
    j := n+1 ;
    ithprime(j)*ithprime(j+2)-3*ithprime(j+1) ;
    %/2 ;
end proc: # R. J. Mathar, Jul 28 2015

Formula

a(n) = A152528(n+1)/2.