153665domain: NAppears in sequencesa(n) = 4*n^4 + 1.at n=13A211412Numbers k such that distances from k to three nearest squares are three perfect squares.at n=20A234335Numbers n such that A003144(n) = floor(alpha*n) + 1, where alpha = 1.839... is the positive real zero of x^3-x^2-x-1.at n=25A275158