a(n) = Sum_{d divides n} (-1)^(n-d)*Stirling1(n,d).
A096308
a(n) = Sum_{d divides n} (-1)^(n-d)*Stirling1(n,d).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =18a(4) =25a(5) =620a(6) =721a(7) =24878a(8) =158445a(9) =1658782a(10) =3628801a(11) =429976228a(12) =479001601a(13) =26820722994a(14) =639056694705
External references
- oeis: A096308