Solutions to abs(sigma(x+1) - sigma(x)) = 2. Divisor sums of x and its neighbor x+1 differ from each other by 2.
A112645
Solutions to abs(sigma(x+1) - sigma(x)) = 2. Divisor sums of x and its neighbor x+1 differ from each other by 2.
Terms
- a(0) =1a(1) =8a(2) =26a(3) =117a(4) =2186a(5) =145215a(6) =1594322
External references
- oeis: A112645