a(n) = least m such that if r and s in {1/2, 1/4, 1/6,..., 1/2n} satisfy r < s, then r < k/m < s for some integer k.
A024820
a(n) = least m such that if r and s in {1/2, 1/4, 1/6,..., 1/2n} satisfy r < s, then r < k/m < s for some integer k.
Terms
- a(0) =3a(1) =5a(2) =13a(3) =19a(4) =33a(5) =41a(6) =61a(7) =85a(8) =99a(9) =129a(10) =163a(11) =181a(12) =221a(13) =265a(14) =313a(15) =339a(16) =393a(17) =451a(18) =513a(19) =545a(20) =613a(21) =685a(22) =761a(23) =841a(24) =883a(25) =969a(26) =1059a(27) =1153a(28) =1251a(29) =1301
External references
- oeis: A024820