G.f.: C - Z; where C is the g.f. for the Catalan numbers (A000108) and Z is the g.f. for A055113 with offset 0.
A111160
G.f.: C - Z; where C is the g.f. for the Catalan numbers (A000108) and Z is the g.f. for A055113 with offset 0.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =4a(4) =9a(5) =31a(6) =91a(7) =309a(8) =1009a(9) =3481a(10) =11956a(11) =42065a(12) =148655a(13) =532039a(14) =1915369a(15) =6950452a(16) =25357233a(17) =93034813a(18) =342888250a(19) =1269246437a(20) =4715945712a(21) =17583623988a(22) =65766726906a(23) =246694006971a(24) =927801717255
External references
- oeis: A111160