A051284 a(n) is the number k, 2^n < k < 2^(n+1), such that k/c(k) is a minimum in the interval, where c(k) is Hofstadter-Conway sequence A004001.

3, 6, 11, 23, 44, 92, 178, 370, 719, 1487, 2897, 5969, 11651, 22223, 45083, 89516, 181385, 353683, 722589, 1423078, 2903564, 5696576, 11635316, 22866150, 46704206, 91835554, 187298550

Offset: 1

Author

Jud McCranie

Keywords

• nonn
• more

Comments

The ratio of k/c(k) (where c(k)=A004001) reaches a maximum of 2.0 when n is a power of 2. When n=6 the ratio has a relative minimum of 1.5, so a(2) = 6.

Crossrefs

Cf. A004001.

Extensions

a(26)-a(27) and title clarified by Sean A. Irvine, Sep 01 2021