118048domain: NAppears in sequencesSums of 4 distinct powers of 7.at n=18A038483Race of lucky numbers of the form 4*k - 1 vs. 4*k + 1 is tied at the a(n)-th lucky number.at n=26A330359Numbers k such that k, k^2-1 and k^2+1 are all fine, where a number m is fine if its prime factors are all less than m^(1/3).at n=31A345896