1,4
Number of V-Toothpicks added to the sieve at the nth round.
Cf. A139251, A160121, A160407, A161207, A161329, A161412.
Sequence in context: A021415 A137363 A110549 this_sequence A069655 A004574 A073127
Adjacent sequences: A161410 A161411 A161412 this_sequence A161414 A161415 A161416
more,nonn
Omar E. Pol (info(AT)polprimos.com), Jun 10 2009
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