Nearest integer to Gamma(n+3/4).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =17a(5) =79a(6) =453a(7) =3058a(8) =23698a(9) =207359a(10) =2021746a(11) =21733773a(12) =255371836a(13) =3255990905a(14) =44769874946a(15) =660355655454