A085601

[franktaw at netscape.net]

This led me to look at other odd combinations.  I'm happy to report 
that there are no sequences that are both easy and hard.  There are, 
however, 28 sequences that are both easy and obscure.

One of these, A085601, appears to me to be incorrect.  The sequence 
clearly consists exclusively of numbers of the form m^2 + (m+1)^2.  The 
values now present have values of m that, except for the early 5 (m=1), 
are successive even integers.

Following the construction, it appears to me that in fact, except for 
the initial 1 (m=0), the values of m should be the powers of 2.  So the 
sequence would start:

1,5,13,41,145,545,2113,8321.

Franklin T. Adams-Watters


-----Original Message-----
From: Marc LeBrun <mlb at well.com>
There *is* however 
<http://www.research.att.com/~njas/sequences//~njas/sequences/A056755>A05
6755 which is currently uniquely both nice and obscure.