Transform of Catalan numbers whose Hankel transform satisfies the Somos-4 recurrence.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =14a(5) =37a(6) =105a(7) =312a(8) =956a(9) =2996a(10) =9554a(11) =30897a(12) =101083a(13) =333947a(14) =1112497a(15) =3732956a(16) =12605030a(17) =42800318a(18) =146046820a(19) =500555448a(20) =1722402304a(21) =5948047170a(22) =20607691518a(23) =71610355541a(24) =249520257107a(25) =871614139397