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A280746
Index of 2^n in A280864.
2
1, 2, 3, 6, 13, 30, 65, 127, 258, 530, 1009, 1988, 3942, 8004, 16195, 32389, 64923, 129870, 260326, 520787, 1043257, 2085202, 4171403, 8338443
OFFSET
0,2
EXAMPLE
A280864(30) = 32, so a(5) = 30.
CROSSREFS
Sequence in context: A107316 A124682 A079512 * A174191 A052937 A005554
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jan 13 2017
EXTENSIONS
a(17)-a(23) from Lars Blomberg, Jan 14 2017
STATUS
approved