A072672 - OEIS

%I #3 Mar 30 2012 18:50:24

%S 11,31,83,159,359,531,791,1079,1487,2159,2559,3419,4283,4751,5471,

%T 7127,8399,9423,11151,12527,13467,15519,16799,20159,22539,24479,26207,

%U 28511,29919,32147,37631,41183,43883,47319,52499,54719,59091,62975,66863

%N Prime(n)*prime(2*n)+prime(n)+prime(2*n).

%e a(10) = A000040(10)*A000040(20)+A000040(10)+A000040(20) = 29*71+29+71 = 2159.

%Y Cf. A072668, A072673.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Jun 30 2002