105788domain: NAppears in sequencesPowers of fifth root of 21 rounded up.at n=19A018176a(n) is the index of the first occurrence of the Euclidean distance prime(n) from a point on a square spiral to its starting point at 1.at n=37A336335Expansion of sqrt(1 - 4*x*sqrt(1 - 4*x)).at n=12A377243