OFFSET
1,1
COMMENTS
Every multiple of a member is a member.
Every integer 2^r*m (r>2, m odd) is a member.
Every prime p congruent 1, 9, 11, 13, 17, 19 (mod 20) is a member (see reference).
LINKS
A. P. Shah, Fibonacci Sequence Modulo m, Fibonacci Quarterly, Vol.6, No.2 (1968), 139-141.
FORMULA
A066853(a(n)) < a(n) in ascending order.
EXAMPLE
16 is a member because A066853(16) = 11 < 16.
PROG
(PARI) isok(k) = {if(k<8, return(0)); my(v=List([1, 2])); while(v[#v]!=1 || v[#v-1]!=0, listput(v, (v[#v]+v[#v-1])%k)); #Set(v)<k; } \\ Jinyuan Wang, Mar 20 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Franz Vrabec, Oct 21 2014
EXTENSIONS
More terms from Jinyuan Wang, Mar 20 2020
STATUS
approved