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A078159 a(n)=A055086[2^n]. 3
2, 3, 4, 7, 10, 15, 21, 31, 44, 63, 89, 127, 180, 255, 361, 511, 723, 1023, 1447, 2047, 2895, 4095, 5791, 8191, 11584 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(2n-2)=2^n-1 and a(n)=2a(n-2)+1 generally.

LINKS

Table of n, a(n) for n=1..25.

MATHEMATICA

Table[ Length[ Union[ Table[ Floor[2^w/j], {j, 1, 2^w}]]], {w, 1, 25}]

CROSSREFS

Cf. A055086, A078160, A078161 & A078162.

Sequence in context: A267459 A145467 A039841 * A129490 A018132 A100638

Adjacent sequences:  A078156 A078157 A078158 * A078160 A078161 A078162

KEYWORD

nonn

AUTHOR

Labos Elemer, Nov 27 2002

EXTENSIONS

Extended by Robert G. Wilson v, Dec 02 2002

STATUS

approved

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Last modified May 27 11:14 EDT 2017. Contains 287204 sequences.