a(n) = n! * Sum_{k=1..n} A008836(k)/k.

Terms

a(0) =1a(1) =1a(2) =1a(3) =10a(4) =26a(5) =276a(6) =1212a(7) =4656a(8) =82224a(9) =1185120a(10) =9407520a(11) =72973440a(12) =469653120a(13) =12802164480a(14) =279210758400