a(1)=1; thereafter, a(n+1) = Sum_{d divides n} (n!/(d!*(n/d)!))*(n/d)*a(d).
A295578
a(1)=1; thereafter, a(n+1) = Sum_{d divides n} (n!/(d!*(n/d)!))*(n/d)*a(d).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =27a(6) =573a(7) =580a(8) =14028a(9) =104757a(10) =845647a(11) =845658a(12) =120596070a(13) =120596083a(14) =10092478017a(15) =157205844432
External references
- oeis: A295578