OFFSET
1,3
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..22
Reinhard Zumkeller, p(n)!-p(n )#+1
MATHEMATICA
EulerPhi[Table[Prime[n]! - Product[Prime[i], {i, 1, n}] + 1, {n, 1, 10}] ](* Amiram Eldar, Feb 21 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Feb 20 2005
STATUS
approved