a(n) = (9*n/4 - 51/8 - 5/(16*n-24) + 1/n + 6/(n+1))*binomial(2*n-2,n-1).
A344728
a(n) = (9*n/4 - 51/8 - 5/(16*n-24) + 1/n + 6/(n+1))*binomial(2*n-2,n-1).
Terms
- a(0) =12a(1) =79a(2) =419a(3) =2036a(4) =9435a(5) =42449a(6) =187187a(7) =813592a(8) =3497988a(9) =14912910a(10) =63151022a(11) =265958200a(12) =1114981465a(13) =4656455685a(14) =19383036675a(15) =80456688240a(16) =333146169840
External references
- oeis: A344728