[seqfan] Re: A puzzle from Emissary

N. J. A. Sloane njas at research.att.com
Wed Nov 30 19:20:06 CET 2011


Marc said:

>Is the sequence
>  a(n) := number of powers of 2 that can be reached from n in just one step
>or
>  a(n) := number of distinct values that can be reached in just one step
>at all interesting?

>I haven't been following the constructions closely enough, but given that
>n=2^k can go to k+1 different powers of 2 I was wondering about other n.

>_______________________________________________

Yes! Also the analogues in other bases. So far we have 
just one sequence, A201219.
Neil




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