Nearest integer to Gamma(n + 1/6)/Gamma(1/6).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =6a(6) =29a(7) =177a(8) =1269a(9) =10366a(10) =95020a(11) =966032a(12) =10787363a(13) =131246245a(14) =1728075563a(15) =24481070470a(16) =371296235455