Sum of divisors of Catalan number A000108(n).

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =24a(5) =96a(6) =336a(7) =672a(8) =3024a(9) =9072a(10) =35280a(11) =120960a(12) =483840a(13) =1874880a(14) =10108800a(15) =20217600a(16) =107827200a(17) =398131200a(18) =1919877120a(19) =6051594240a(20) =24710676480a(21) =86487367680a(22) =339771801600