OFFSET
1,4
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..1000
PROG
(PARI) {a(n) = sum(k=2, prime(n), (-1)^k*sumdigits(prime(n), k))}
CROSSREFS
KEYWORD
sign,base
AUTHOR
Seiichi Manyama, Aug 06 2019
STATUS
approved