1,1

a(4) has 292 digits and is too large to include.

Cf. A000215, A053067, A133013.

Sequence in context: A160362 A155852 A003392 this_sequence A100339 A158247 A034314

Adjacent sequences: A133023 A133024 A133025 this_sequence A133027 A133028 A133029

base,bref,easy,nonn

Omar E. Pol (info(AT)polprimos.com), Nov 09 2007