0,3
Motzkin numbers: A001006. Cf. A000312, A008973, A008974, A132639.
Sequence in context: A060757 A136807 A057156 * A137840 A068417 A116967
Adjacent sequences: A132653 A132654 A132655 * A132657 A132658 A132659
easy,nonn
Omar E. Pol (info(AT)polprimos.com), Sep 07 2007