Number of meanders of order 2n+1 (4*n+2 crossings of the infinite line) with only central 1-1 cut (no other 1-1 cuts).
A207851
Number of meanders of order 2n+1 (4*n+2 crossings of the infinite line) with only central 1-1 cut (no other 1-1 cuts).
Terms
- a(0) =4a(1) =16a(2) =324a(3) =12100a(4) =595984a(5) =35236096a(6) =2363709924a(7) =174221090404
External references
- oeis: A207851