a(0)=1; for n>0, a(n) is the number of rooted 3-regular maps with 2n vertices on the projective plane.

A322928

a(0)=1; for n>0, a(n) is the number of rooted 3-regular maps with 2n vertices on the projective plane.

Terms

    a(0) =1a(1) =9a(2) =118a(3) =1773a(4) =28650a(5) =484578a(6) =8457708a(7) =151054173a(8) =2745685954a(9) =50606020854a(10) =943283037684

External references