0,3

A133602 is a companion sequence.

A133566 * A000108 where A133566 = an infinite lower triangular matrix and A000108 = the Catalan sequence. For odd n, a(n) = C(n). For even n, a(n) = C(n) + C(n-1).

a(5) = C(5) = 42.

a(6) = 174 = C(6) + C(5) = 132 + 42.

Cf. A133566, A000108, A133602.

Sequence in context: A148532 A148533 A034511 this_sequence A148534 A148535 A148536

Adjacent sequences: A133600 A133601 A133602 this_sequence A133604 A133605 A133606

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 18 2007