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A060505 a(n) = floor(2^n/(n^2)). 6
2, 1, 0, 1, 1, 1, 2, 4, 6, 10, 16, 28, 48, 83, 145, 256, 453, 809, 1452, 2621, 4755, 8665, 15857, 29127, 53687, 99273, 184112, 342392, 638372, 1193046, 2234634, 4194304, 7887910, 14861478, 28048766, 53024287, 100393684, 190358661, 361443664 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..200

FORMULA

a(n) = floor(A000079(n)/A000290(n+1)).

MATHEMATICA

Table[Floor[2^w/(w^2)], {w, 1, 40}];

PROG

(PARI) a(n)={floor(2^n/(n^2))} \\ Harry J. Smith, Jul 06 2009

CROSSREFS

Sequence in context: A299038 A273693 A219967 * A316101 A211452 A035188

Adjacent sequences:  A060502 A060503 A060504 * A060506 A060507 A060508

KEYWORD

easy,nonn

AUTHOR

Labos Elemer, Apr 11 2001

STATUS

approved

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Last modified July 15 23:32 EDT 2020. Contains 335774 sequences. (Running on oeis4.)