OFFSET
1,1
COMMENTS
Not closed under multiplication: 8, 100 are terms, but 800 = 8 * 100 is in A008478. Obviously, the product of two coprime terms is again a term.
For primes p, p^e is a term if and only if p^e = 8, or p > e >= 2 and p^e != 9.
LINKS
Jianing Song, Table of n, a(n) for n = 1..15731 (All terms <= 10^6).
EXAMPLE
PROG
(PARI) isA344714(n) = (factorback(factor(n)*[0, 1; 1, 0])>n) \\ following program for A008477
CROSSREFS
KEYWORD
nonn
AUTHOR
Jianing Song, May 27 2021
STATUS
approved