a(n) = 2*12^n*Gamma(n+1/2)*(n+1)/(sqrt(Pi)*Gamma(n+3)).
A275607
a(n) = 2*12^n*Gamma(n+1/2)*(n+1)/(sqrt(Pi)*Gamma(n+3)).
Terms
- a(0) =1a(1) =4a(2) =27a(3) =216a(4) =1890a(5) =17496a(6) =168399a(7) =1667952a(8) =16888014a(9) =173997720a(10) =1818276174a(11) =19225409616a(12) =205299909828
External references
- oeis: A275607