1,1

for n=7, a(7)=83509=37*37*61, Sigma[83509]+510510=87234+510510=Sigma[83509+510510]= Sigma[594019]=597744

The prime solutions for particular Sigma[x+primorial]=Sigma[x]+primorial equations are in A049481-A049485.

A000203, A002110, A015913-A015917, A049902-A049905, A049481-A049485.

Sequence in context: A059665 A059664 A108832 this_sequence A054982 A108785 A050507

Adjacent sequences: A055006 A055007 A055008 this_sequence A055010 A055011 A055012

more,nonn

Labos E. (labos(AT)ana.sote.hu), May 31 2000