a(n) = numerator of fraction a/b, where gcd(a, b) = 1, whose decimal representation has the form 0.(1)(2)(3)...(n-1)(n)... with period (1)(2)(3)...(n-1)(n).
A172496
a(n) = numerator of fraction a/b, where gcd(a, b) = 1, whose decimal representation has the form 0.(1)(2)(3)...(n-1)(n)... with period (1)(2)(3)...(n-1)(n).
Terms
- a(0) =1a(1) =4a(2) =41a(3) =1234a(4) =4115a(5) =41152a(6) =1234567a(7) =1371742a(8) =13717421a(9) =12345678910a(10) =411522630337
External references
- oeis: A172496