Nearest integer to Gamma(n+1/4).

Terms

a(0) =4a(1) =1a(2) =1a(3) =3a(4) =8a(5) =35a(6) =185a(7) =1155a(8) =8377a(9) =69106a(10) =639233a(11) =6552134a(12) =73711509a(13) =902965986a(14) =11964299312a(15) =170491265198