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A351524
Number of powers of 11 modulo n.
16
1, 1, 2, 2, 1, 2, 3, 2, 6, 1, 2, 2, 12, 3, 2, 4, 16, 6, 3, 2, 6, 2, 22, 2, 5, 12, 18, 6, 28, 2, 30, 8, 3, 16, 3, 6, 6, 3, 12, 2, 40, 6, 7, 3, 6, 22, 46, 4, 21, 5, 16, 12, 26, 18, 2, 6, 6, 28, 58, 2, 4, 30, 6, 16, 12, 3, 66, 16, 22, 3, 70, 6, 72, 6, 10, 6, 4, 12, 39, 4, 54, 40, 41, 6, 16, 7, 28
OFFSET
1,3
COMMENTS
This is the original version of A054711 rev. #1 as defined by Henry Bottomley, Apr 20 2000.
A054711 is now different from the sequence here.
LINKS
MATHEMATICA
a[n_] := Module[{e = IntegerExponent[n, 11]}, e + MultiplicativeOrder[11, n/11^e]]; Array[a, 100] (* Amiram Eldar, Aug 25 2024 *)
CROSSREFS
Cf. A054711.
Cf. A054703 (base 2), A054704 (3), A054705 (4), A054706 (5), A054707 (6), A054708 (7), A054709 (8), A054717 (9), A054710 (10), A054712 (12), A054713 (13), A054714 (14), A054715 (15), A054716 (16).
Sequence in context: A129710 A298857 A070680 * A054711 A241424 A334671
KEYWORD
nonn,easy
AUTHOR
Georg Fischer, Feb 13 2022
STATUS
approved