75441domain: NAppears in sequencesNumbers k such that 10^k + 13 is prime.at n=23A095688Zeros in Cald's sequence: positions k such that A006509(k) = 0.at n=13A112877Position of 5^n in A051037 (5-smooth numbers).at n=50A188427n^3 + 4*n^2 - 5*n + 1.at n=41A241577