a(n) is the smallest x for which the following quotient is an integer: (sigma(x) + ... + sigma(x+n-1))/sigma(x+(x+1)+ ... + (x+n-1)), i.e., sum(sigma(j))/sigma(sum(j)) for n terms summed up was integer.
A091293
a(n) is the smallest x for which the following quotient is an integer: (sigma(x) + ... + sigma(x+n-1))/sigma(x+(x+1)+ ... + (x+n-1)), i.e., sum(sigma(j))/sigma(sum(j)) for n terms summed up was integer.
Terms
- a(0) =1a(1) =1a(2) =424a(3) =7a(4) =13980a(5) =2a(6) =805675056a(7) =15662957033a(8) =7a(9) =42a(10) =48957
External references
- oeis: A091293