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A152527
a(n) = (p(n)*p(n+1)-p(n+2))/2, where p(n) is the n-th odd prime.
7
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
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
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Dec 06 2008
STATUS
approved