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%I #9 Jan 21 2019 19:01:55
%S 3,24,99,288,783,1680,3363,5928,9999,16640,25599,38808,56643,78960,
%T 107583,145160,193599,251000,322623,408320,506943,625680,763875,
%U 927368,1123599,1347920,1597695,1879640,2190399,2537648,2958399,3426200
%N Sum(prime(k),k=1..n)^2-1.
%F a(n) = A007504(n)^2 - 1. - _Michel Marcus_, Jun 30 2013
%t Accumulate[Prime[Range[40]]]^2-1 (* _Harvey P. Dale_, Feb 25 2017 *)
%o (PARI) a(n) = sum(k=1, n, prime(k))^2-1 \\ _Michel Marcus_, Jun 30 2013
%K nonn
%O 1,1
%A _Jorge Coveiro_, Apr 14 2004
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