M. F. Hasler: "11,12,42,84,124,135,248,325,366,510,550,555,624,650,714,1010,1111,1525,1734,2510,3913,4020,5100,5500,5610,5625,8040,..." That would be *at least* twice as opposed to *exactly* twice, because 1111 is thrice.