A simple grammar: labeled pairs of sequences of cycles.

A052801

A simple grammar: labeled pairs of sequences of cycles.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =46a(4) =342a(5) =3108a(6) =33324a(7) =411360a(8) =5741856a(9) =89379120a(10) =1534623936a(11) =28804923024a(12) =586686138384

External references