a(n) = least m such that if r and s in {1/1, 1/2, 1/3, ..., 1/n} satisfy r < s, then r < k/m < (k+2)/m < s for some integer k.
A024840
a(n) = least m such that if r and s in {1/1, 1/2, 1/3, ..., 1/n} satisfy r < s, then r < k/m < (k+2)/m < s for some integer k.
Terms
- a(0) =7a(1) =17a(2) =31a(3) =49a(4) =71a(5) =97a(6) =127a(7) =169a(8) =209a(9) =262a(10) =311a(11) =375a(12) =433a(13) =508a(14) =575a(15) =661a(16) =737a(17) =834a(18) =919a(19) =1027a(20) =1141a(21) =1241a(22) =1366a(23) =1497a(24) =1611a(25) =1753a(26) =1901a(27) =2029a(28) =2188a(29) =2353
External references
- oeis: A024840