536870885domain: NAppears in sequencesa(n) = the least positive integer k such that Omega(n+k) = Omega(k)+n, where Omega(m) (A001222) denotes the number of prime factors of m, counting multiplicity.at n=26A076158Numbers missing from A102370.at n=28A102371a(n) = 2^(n+1) - n + 1.at n=28A132753a(n) = 2^n - 27.at n=29A220087