A117388, A117390

franktaw at netscape.net franktaw at netscape.net
Thu Apr 27 19:31:13 CEST 2006

It is: A113762.
There really should be a crossref back to that sequence.
Franklin T. Adams-Watters

-----Original Message-----
From: Joseph Biberstine <jrbibers at indiana.edu>
To: franktaw at netscape.net
Sent: Thu, 27 Apr 2006 13:21:58 -0400
Subject: Re: A117388, A117390

Frank - 
Note a(n) is specified to be n-digits in length, making numbers like 31,51,71 irrelevant here (though if this other idea is not yet it's own sequence that would also be of interest) 
- Joseph 
franktaw at netscape.net wrote: 
> Probably the submitter (Ray G. Opao) meant to exclude numbers with zero > digits, so you don't get leading zeros. 
> > But there are still a lot of numbers missing: 
> > 31,51,71,142,162 
> > (Not a comprehensive list, just some quick values.) 
> > Franklin T. Adams-Watters 
> > > -----Original Message----- 
> From: Hans Havermann pxp at rogers.com <mailto:pxp at rogers.com> 
> > A117388 = A117390 > > %S A117388 21,121,1226,14423 > %N A117388 a(n) is the smallest n-digit integer such if all numbers > formed by inserting the exponentation symbol between any two digits are > added, the sum is prime. > > I get: > > 21, 100, 1000, 10066, 100000, ...  
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