OFFSET
1,2
COMMENTS
No other terms below 10^15. Some larger terms: 79854828136468902206, 3518556634988844968631084847788071912030455376274045370172567094578. - Max Alekseyev, Oct 14 2016
EXAMPLE
3^14 + 5 = 4782974 = 14 * 341641, so 14 is a term.
PROG
(PARI) is(n)=Mod(3, n)^n==-5; \\ Joerg Arndt, Oct 09 2016
(Python)
A277288_list = [1, 2]+[n for n in range(3, 10**6) if pow(3, n, n)==n-5] # Chai Wah Wu, Oct 09 2016
(Sage)
def A277288_list(search_limit):
n, t, r = 1, Integer(3), [1]
while n < search_limit:
n += 1
t *= 3
if n.divides(t+5): r.append(n)
return r # Peter Luschny, Oct 10 2016
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Seiichi Manyama, Oct 09 2016
EXTENSIONS
a(9) from Joerg Arndt, Oct 09 2016
a(10) from Chai Wah Wu, Oct 09 2016
a(11)-a(14) from Max Alekseyev, Oct 14 2016
STATUS
approved