Ceiling of Gamma(n+3/5)/Gamma(3/5).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =9a(5) =42a(6) =232a(7) =1528a(8) =11611a(9) =99851a(10) =958562a(11) =10160756a(12) =117864769a(13) =1485096082a(14) =20197306709a(15) =294880677942