1,3

a(n) = sum_{i=1}^{n-1} q^(i-1) a(i) a(n-i).

Sequence in context: A004145 A145835 A008992 this_sequence A012870 A013474 A013515

Adjacent sequences: A015093 A015094 A015095 this_sequence A015097 A015098 A015099

nonn

Olivier Gerard (olivier.gerard(AT)gmail.com)