%I A104491
%S A104491 2,5,13,19,23,37,67,71,83,107,109,113,139,157,173,199,271
%N A104491 Prime numbers n for which the square excess of the n-th prime is prime.
%F A104491 n such that A102821(n) is prime. n such that A053186(A000040(n)) is an 
               element of A000040.
%e A104491 199 is an element of this sequence because 199 is prime and the 199th 
               prime is 1217 and 1217 - 34^2 = 61 and 61 is prime, while 1217 - 
               35^2 = -8.
%Y A104491 Cf. A000040, A053186, A102821.
%Y A104491 Sequence in context: A112634 A045364 A045365 this_sequence A038950 A019390 
               A073770
%Y A104491 Adjacent sequences: A104488 A104489 A104490 this_sequence A104492 A104493 
               A104494
%K A104491 easy,nonn
%O A104491 1,1
%A A104491 Jonathan Vos Post (jvospost3(AT)gmail.com), Mar 10 2005