

A079802


Group the prime numbers so that the sum of the terms of the nth group is a multiple of that of the (n1)st group: (2), (3,5), (7,11,13,17), (19,23,29,31,37...,79,83), ...; a(n) = sum of nth group.


3




OFFSET

1,1


LINKS



PROG

(PARI) p=2; print1(s=p, ", "); while(s<10^9, p=nextprime(p+1); a=p; while(a%s>0, p=nextprime(p+1); a=a+p); print1(s=a, ", "))


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



