A081889 Least primitive root corresponding to A081888(n).

1, 2, 3, 5, 7, 11, 19, 21, 23, 31, 35, 41, 43, 53, 57, 69, 87, 93, 95, 101, 115, 141, 173, 203

Offset

1,2

Links

Table of n, a(n) for n=1..24.

Prog

(Python)
from sympy import primitive_root
from itertools import count, islice
def f(n): r = primitive_root(n); return r if r != None else 0
def agen(r=0): yield from ((m, r:=f(m))[1] for m in count(1) if f(m) > r)
print(list(islice(agen(), 18))) # Michael S. Branicky, Feb 13 2023

Crossrefs

Cf. A081888, A002229, A002230.

Sequence in context: A284250 A291660 A069749 * A078139 A347337 A210186

Adjacent sequences: A081886 A081887 A081888 * A081890 A081891 A081892

Keyword

nonn,more

Author

Sven Simon, Mar 30 2003

Extensions

a(24) from Michael S. Branicky, Feb 20 2023

Status

approved