A117388, A117390

[franktaw at netscape.net]

Whoops.  I missed the "smallest n digit number" part. 
 
Franklin T. Adams-Watters

 
-----Original Message-----
From: franktaw at netscape.net


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


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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