OFFSET
1,1
LINKS
Hieronymus Fischer, Table of n, a(n) for n = 1..10000
FORMULA
EXAMPLE
{1,3} #2 S=4;
{5,7,9} #3 S=21;
{11,13,15,17,19} #5 S=75;
{21,23,25,27,29,31,33} #7 S=189.
MAPLE
S:= n-> sum(ithprime(k), k=1..n): seq(S(n+1)^2-S(n)^2, n=0..40); # Gary Detlefs, Dec 20 2011
PROG
(Python)
from itertools import islice
from sympy import nextprime
def A034960_gen(): # generator of terms
a, p = 0, 2
while True:
yield p*((a<<1)+p)
a, p = a+p, nextprime(p)
(PARI) a0(n) = vecsum(primes(n))^2 - vecsum(primes(n-1))^2; \\ Michel Marcus, Jun 16 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick De Geest, Oct 15 1998
STATUS
approved