Number of "coprime" pairs of binary trees with n carets (see comments).

A335729

Number of "coprime" pairs of binary trees with n carets (see comments).

Terms

    a(0) =1a(1) =2a(2) =10a(3) =68a(4) =546a(5) =4872a(6) =46782a(7) =474180a(8) =5010456a(9) =54721224a(10) =613912182a(11) =7042779996a(12) =82329308040a(13) =978034001472

External references