Catalan numbers with odd index: a(n) = binomial(4*n+2, 2*n+1)/(2*n+2).
A024492
Catalan numbers with odd index: a(n) = binomial(4*n+2, 2*n+1)/(2*n+2).
Terms
- a(0) =1a(1) =5a(2) =42a(3) =429a(4) =4862a(5) =58786a(6) =742900a(7) =9694845a(8) =129644790a(9) =1767263190a(10) =24466267020a(11) =343059613650
External references
- oeis: A024492