137500domain: NAppears in sequencesHypotenuses for which there exist exactly 5 distinct Pythagorean triangles.at n=27A084649Number of n step walks (each step +-1 starting from 0) which are never more than 4 or less than -4.at n=18A216212Terms of A301517 that are not exponentially odd numbers (A268335).at n=10A335989