535601domain: NAppears in sequencesNumbers k such that sigma(k) = phi(k) + phi(k-1).at n=11A067198a(n) = 2^n + 4^n + 9^n.at n=6A074536Partial sums of floor(n^3/2).at n=45A173704The average of primes dividing n and n+1 is the same.at n=10A227754