A046300 Smallest integer k such that 2^n is the largest power of two that is contained in 2^k as a proper substring.
4, 5, 6, 7, 14, 15, 26, 102, 108, 109, 224, 103, 104, 105, 506, 507, 452, 1169, 1170, 1171, 8228, 10419, 15186, 5227, 16619, 16620, 16621, 25102, 130090, 62640, 330791, 330792, 351403, 273100, 681504, 649069, 352375, 3045104, 3045105, 3635007
Offset: 0
Examples
2^4={1}6 and 2^0=1; 2^5=3{2} and 2^1=2; 2^6=6{4} and 2^2=4; etc.
Crossrefs
Cf. A033921.
Extensions
Definition reworded, offset changed to 0, and terms a(20)-a(36) added by Jon E. Schoenfield, Jun 04 2010
a(37)-a(39) from Jon E. Schoenfield, Jul 10 2010
Comments