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 < (k+4)/m < s for some integer k.
A024848
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 < (k+4)/m < s for some integer k.
Terms
- a(0) =19a(1) =53a(2) =103a(3) =169a(4) =251a(5) =349a(6) =463a(7) =593a(8) =739a(9) =901a(10) =1101a(11) =1299a(12) =1537a(13) =1769a(14) =2045a(15) =2311a(16) =2625a(17) =2925a(18) =3277a(19) =3611a(20) =4001a(21) =4369a(22) =4797a(23) =5199a(24) =5665a(25) =6101a(26) =6605a(27) =7075a(28) =7617a(29) =8121
External references
- oeis: A024848