|
%I #8 Mar 30 2012 17:34:14
%S 11,26,42,70,99,125,154,183,231,264,309,363,389,414,490,537,580,649,
%T 692,727,786,824,935,978,1023,1080,1128,1170,1220,1311,1401,1436,1533,
%U 1605,1647,1734,1807,1855,1917,1986,2053,2131,2200,2250,2312,2407,2501,2583
%N 2*a(n) = prime(prime(n)) + prime(prime(2n)).
%F a(n) = (A006450(n)+A006450(2n))/2.
%t A=Floor[Log[2]*n/Log[2]] B=Floor[2*Log[2]*n/Log[2]] f[n_]:=(Prime[Prime[A]]+Prime[Prime[B]])/2 digits=200 a=Table[f[n], {n, 2, digits}]
%Y Cf. A100567.
%K nonn
%O 2,1
%A _Roger L. Bagula_, Nov 28 2004
|
