OFFSET
1,1
COMMENTS
This is A111071 without its first term. - R. J. Mathar, Jul 27 2015
FORMULA
a(n) = A152530(n+1)/2.
MAPLE
A152531 := proc(n)
j := n+1 ;
ithprime(j)*ithprime(j+2)-ithprime(j+1) ;
%/2 ;
end proc: # R. J. Mathar, Jul 28 2015
MATHEMATICA
(First[#]*Last[#]-#[[2]])/2&/@Partition[Prime[Range[2, 50]], 3, 1] (* Harvey P. Dale, Oct 09 2014 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Dec 06 2008
STATUS
approved