1,1
Cf. A139251, A160123, A161430, A161431, A161432.
Sequence in context: A178820 A145598 A117881 * A180498 A107856 A168373
Adjacent sequences: A161430 A161431 A161432 * A161434 A161435 A161436
more,nonn
Omar E. Pol (info(AT)polprimos.com), Jun 17 2009