50245domain: NAppears in sequencesPositive numbers y such that y^2 is of the form x^2+(x+151)^2 with integer x.at n=11A161483The number of distinct positions on an infinite chessboard reachable by the (2,3)-leaper (or zebra) in at most n moves.at n=39A297740Centered square numbers which are sphenic numbers.at n=20A380882