[seqfan] Re: complementing A121558

Richard Mathar mathar at strw.leidenuniv.nl
Sat Jul 25 20:32:25 CEST 2009

hve> From seqfan-bounces at list.seqfan.eu Sat Jul 25 20:07:12 2009
hve> Date: Sat, 25 Jul 2009 19:49:56 +0200
hve> From: Hagen von Eitzen <math at von-eitzen.de>
hve> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
hve> ..
hve> >   
hve> It even seem sthat the terms after 3313 are plain wrong.
hve> Or did I miss something in the following pari computation:
hve> P=prod(k=1, 1000, 1+x^k, 1+x*O(x^1000));
hve> for(n=1,1000,t=n+polcoeff(P,n);if(isprime(t),print1(t,",")))
hve> 2,3,5,17,23,31,73,97,127,167,191,797,1021,1153,1301,3313,9851,40099,206939,
hve> 345953,444893,570181,2032409,10327297,15757649,40982701,69545527,281138239,657667789,
hve> 1333640927,32173820179,48626519377,53868949807,495811829089,41328689179429,
hve> 232282884905431,406202130845981,2608327191290453,15475586776823633,
hve> 27574512158560853,36704653322668189,69395901032399983,91840127431010423,
hve> 105585005382256889,130050574409983361,476517655182416039,870734084093744939,
hve> 6162297935619708167,8475550903782346751,23192540574062407799,84421875547541660201,
hve> 604490895403729930283,3819342674540204978827,
hve> Apparently, 281641, 451331, 966527, ... do not occur.

Everything which is a superset of A163153 is fine with me.
(I did not compute further than the first two missing ones).


More information about the SeqFan mailing list