Secondary root edges in doubly rooted tree maps with n edges.
A046715
Secondary root edges in doubly rooted tree maps with n edges.
Terms
- a(0) =0a(1) =1a(2) =10a(3) =105a(4) =1176a(5) =13860a(6) =169884a(7) =2147145a(8) =27810640a(9) =367479684a(10) =4936848280a(11) =67255063876a(12) =927192688800
External references
- oeis: A046715