OFFSET
1,1
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..1000
N. Lygeros, O. Rozier, A new solution to the equation tau(p) == 0 (mod p), J. Int. Seq. 13 (2010) # 10.7.4.
FORMULA
Let b(n) = 5*n^4 - 9*n^2 - 5*n - 1.
a(n) = b(prime(n)).
PROG
(PARI) b(n) = 5*n^4 - 9*n^2 - 5*n - 1;
a(n) = b(prime(n)); \\ Michel Marcus, Jan 01 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Dec 31 2017
STATUS
approved