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

1,1

Links

Table of n, a(n) for n=1..40.

Formula

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

Maple

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

Crossrefs

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

Sequence in context: A328240 A369817 A161217 * A005104 A028921 A028922

Adjacent sequences: A152524 A152525 A152526 * A152528 A152529 A152530

Keyword

easy,nonn

Author

Omar E. Pol, Dec 06 2008

Status

approved