Sum_{k|n} a(k)/k! = Sum_{j=1 to n} 1/j, sum on left is over positive divisors k of n.
A067857
Sum_{k|n} a(k)/k! = Sum_{j=1 to n} 1/j, sum on left is over positive divisors k of n.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =14a(4) =154a(5) =84a(6) =8028a(7) =25584a(8) =361296a(9) =528480a(10) =80627040a(11) =33471360a(12) =13575738240a(13) =13835646720a(14) =263577888000
External references
- oeis: A067857