a(1) = 1, a(n) = a(n-1)/gcd(a(n-1),n) if gcd(a(n-1),n) > 1 otherwise a(n) is the concatenation of a(n-1) and n.
A079792
a(1) = 1, a(n) = a(n-1)/gcd(a(n-1),n) if gcd(a(n-1),n) > 1 otherwise a(n) is the concatenation of a(n-1) and n.
Terms
- a(0) =1a(1) =12a(2) =4a(3) =1a(4) =15a(5) =5a(6) =57a(7) =578a(8) =5789a(9) =578910a(10) =57891011a(11) =5789101112a(12) =578910111213a(13) =82701444459a(14) =27567148153
External references
- oeis: A079792