0,3
a(n) = A001006(n)^2
Cf. A000290, A001248, A007598. Motzkin numbers: A001006.
Sequence in context: A002777 A118997 A001257 * A110378 A076997 A092304
Adjacent sequences: A133050 A133051 A133052 * A133054 A133055 A133056
nonn
Omar E. Pol (info(AT)polprimos.com), Oct 30 2007