[seqfan] Re: Skolem with digits

DAN_CYN_J dan_cyn_j at comcast.net
Tue Apr 2 02:35:42 CEST 2013



Hi Eric, 



I did have an old basic program that produced this sequence  to 

thousands of terms. 

I will see if I can find it. 


Dan 



----- Original Message -----


From: "Eric Angelini" <Eric.Angelini at kntv.be> 
To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu> 
Sent: Sunday, March 31, 2013 7:56:54 PM 
Subject: [seqfan] Skolem with digits 


Hello SeqFans, 
This is a Skolem-like sequence S where all natural integer appear exactly twice and where two equal terms T of S are separated by exactly T < digits >. 

S=1,2,1,3,2,4,5,3,6,7,4,8,5,12,6,9,7,11,8,10,aaa,9,12,13,11,10,14,16,18,bbb, 
13,15,ccc,14,17,16,19,18,20,15,21,23,ddd,17,22,24,19,eee,20,fff,21,25,23, 
26,28,22,27,24,29,31,33,35,37,... 

The above 3-digit terms aaa, bbb, ccc,... are missing (I am unable 
to compute them by hand). Could someone find them and extend S? 
S should be, of course, the lexicofirst such sequence. 
S could be seen as the "digit-version" of http://oeis.org/A026272 

Best, 
É. 




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