56332domain: NAppears in sequencesL_2 norm of vertices of Permuto-Associahedron in R^n.at n=7A071171a(n) is the number of distinct pairs that can be made in exactly n iterations of either of the two maps (x, y) -> (x OR (2^y), 0) or (x, y) -> (x, y+1), starting from (0,0).at n=41A353150