a(n) = least m such that if r and s in {1/4, 1/8, 1/12,..., 1/4n} satisfy r < s, then r < k/m < s for some integer k.

A024825

a(n) = least m such that if r and s in {1/4, 1/8, 1/12,..., 1/4n} satisfy r < s, then r < k/m < s for some integer k.

Terms

    a(0) =5a(1) =9a(2) =25a(3) =37a(4) =65a(5) =81a(6) =121a(7) =169a(8) =197a(9) =257a(10) =325a(11) =361a(12) =441a(13) =529a(14) =625a(15) =677a(16) =785a(17) =901a(18) =1025a(19) =1089a(20) =1225a(21) =1369a(22) =1521a(23) =1681a(24) =1765a(25) =1937a(26) =2117a(27) =2305a(28) =2501a(29) =2601

External references