1,1

n such that A102821(n) is prime. n such that A053186(A000040(n)) is an element of A000040.

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.

Cf. A000040, A053186, A102821.

Sequence in context: A112634 A045364 A045365 this_sequence A038950 A019390 A073770

Adjacent sequences: A104488 A104489 A104490 this_sequence A104492 A104493 A104494

easy,nonn

Jonathan Vos Post (jvospost3(AT)gmail.com), Mar 10 2005