1,1
Cf. A139251, A160123, A161430, A161431, A161432.
Sequence in context: A145598 A117881 A006343 this_sequence A107856 A128499 A048223
Adjacent sequences: A161430 A161431 A161432 this_sequence A161434 A161435 A161436
more,nonn
Omar E. Pol (info(AT)polprimos.com), Jun 17 2009
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