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+2)/m < s for some integer k.
A024842
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+2)/m < s for some integer k.
Terms
- a(0) =11a(1) =29a(2) =55a(3) =89a(4) =131a(5) =181a(6) =253a(7) =323a(8) =417a(9) =505a(10) =621a(11) =727a(12) =865a(13) =989a(14) =1149a(15) =1291a(16) =1473a(17) =1633a(18) =1837a(19) =2053a(20) =2243a(21) =2481a(22) =2731a(23) =2949a(24) =3221a(25) =3505a(26) =3751a(27) =4057a(28) =4375a(29) =4649
External references
- oeis: A024842