OFFSET
1,5
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..1000 (terms 1..200 from T. D. Noe)
Ondrej Such, An Insufficient Condition for Primality, Problem 10268, Amer. Math. Monthly, Vol. 103, No. 10 (1996), p. 911.
PROG
(PARI) c(n) = polsym(x^3-x-1, n)[n+1]; \\ A001608
a(n) = my(p=prime(n)); c(p)/p; \\ Michel Marcus, Mar 03 2022
CROSSREFS
KEYWORD
nonn,easy,nice
AUTHOR
STATUS
approved