[seqfan] Re: Sum of two consecutive digits is a prime

Eric Angelini Eric.Angelini at kntv.be
Mon Mar 23 15:10:04 CET 2009


I have my answer, thanks (to M.H)!
Best,
É.
1,2,3,4,7,41,43,47,49,83,85,89,202,302,303,411,412,502,503,830,
2020,2021,2023,2025,2029,2030,2032,3020,3021,4111,4112,
5020,5021,6111,6112,9202,9203,20202,30202,30203,41111,41112,
50202,50203,83020,202020, ...
 

-----Message d'origine-----
De : seqfan-bounces at list.seqfan.eu
[mailto:seqfan-bounces at list.seqfan.eu]  
De la part de Eric Angelini
Envoyé : lundi 23 mars 2009 14:14
À : seqfan at list.seqfan.eu
Objet : [seqfan] Sum of two consecutive digits is a prime

Hello SeqFans,

a(1)=1
a(n) is always the smallest integer > a(n-1) such that
two consecutive digits in the sequence sum up to a prime:

S = 1,2,3,4,7,41,43,47,49,83,85,89,202,302,303,411,412,...

Could someone please check and compute this? The sequence
echoes this one:
http://www.research.att.com/~njas/sequences/A073627

Best,
É.





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