login
A216833
Multiplicative order of 2 mod 3*(2n-1).
3
2, 6, 4, 6, 18, 10, 12, 12, 8, 18, 6, 22, 20, 54, 28, 10, 30, 12, 36, 12, 20, 14, 36, 46, 42, 24, 52, 20, 18, 58, 60, 18, 12, 66, 66, 70, 18, 60, 30, 78, 162, 82, 8, 84, 22, 12, 30, 36, 48, 90, 100, 102, 12, 106, 36, 36, 28, 44, 36, 24, 110, 60, 100, 14, 42
OFFSET
1,1
COMMENTS
a(n) is the smallest m such that 3*(2n-1) | (2^m+1).
LINKS
FORMULA
a(n) = 2*A216829(n).
MATHEMATICA
Table[MultiplicativeOrder[2, 3*(2*n-1)], {n, 100}] (* T. D. Noe, Sep 19 2012 *)
PROG
(PARI) vector(100, n, znorder(Mod(2, 3*(2*n-1)))) \\ Joerg Arndt, Sep 14 2012.
(GAP) List([1..70], n->OrderMod(2, 3*(2*n-1))); # Muniru A Asiru, Feb 25 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
V. Raman, Sep 17 2012
STATUS
approved