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+1)/m < s for some integer k.
A024835
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+1)/m < s for some integer k.
Terms
- a(0) =7a(1) =17a(2) =31a(3) =49a(4) =81a(5) =111a(6) =157a(7) =197a(8) =257a(9) =307a(10) =381a(11) =441a(12) =529a(13) =625a(14) =703a(15) =813a(16) =931a(17) =1025a(18) =1157a(19) =1297a(20) =1407a(21) =1561a(22) =1723a(23) =1849a(24) =2025a(25) =2209a(26) =2401a(27) =2551a(28) =2757a(29) =2971
External references
- oeis: A024835