1,2
The next term is > 1500.
a(3)=3 because (2*3)!/(2*3!)+1=720/12+1=61 is prime.
Cf. A091907.
Sequence in context: A117086 A081026 A137808 this_sequence A100883 A104012 A164830
Adjacent sequences: A091906 A091907 A091908 this_sequence A091910 A091911 A091912
nonn
Hugo Pfoertner (hugo(AT)pfoertner.org), Feb 10 2004
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