1,1
Cf. A000215, A007908, A019518. Fermat primes: A019434.
Adjacent sequences: A132937 A132938 A132939 this_sequence A132941 A132942 A132943
Sequence in context: A125530 A068726 A093583 this_sequence A132941 A068002 A132557
easy,nonn,base
Omar E. Pol (info(AT)polprimos.com), Oct 16 2007
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