[seqfan] Re: Observation on the divisors of 136

Antti Karttunen antti.karttunen at gmail.com
Sun Dec 31 22:03:05 CET 2017


Neil Fernandez wrote in
http://list.seqfan.eu/pipermail/seqfan/2017-December/018224.html

> Excluding powers of 2, the sequence begins
> 3, 10, 136, 32896
> with no more members less than 10^7.

This is a subsequence of
https://oeis.org/A295296
"Numbers n such that the sum of their divisors + the number of ones in
their binary expansion = 2n", which is just one among many of its
equivalent interpretations.


Best regards,

Antti



More information about the SeqFan mailing list