editing

approved

0, 2, 5, 8, 15, 28, 52, 96, 181, 341, 645, 1224, 2332, 4456, 8535, 16384, 31515, 60729, 117218, 226594, 438637, 850192, 1649843, 3205122, 6232879, 12132353, 23636674, 46088019, 89934783, 175624456, 343195341, 671088640, 1313061078, 2570645474, 5035452071

approved

editing

proposed

approved

editing

proposed

Corrected a(4) = 8 (was 9) corrected and a(34) added a(34) from _by _Harry J. Smith_, Oct 24 2009

Ceilinga(n) = ceiling( log_2(n)*2^n/n ).

Harry J. Smith, <a href="/A065618/b065618.txt">Table of n, a(n) for n = 1,...,200</a>

(PARI) { default(realprecision, 100); t=1/log(2); for (n=1, 200, write("b065618.txt", n, " ", ceil( t*log(n)*2^n/n - 0.0000001)) ) } [From _\\ _Harry J. Smith_, Oct 24 2009]

approved

editing

(PARI) { default(realprecision, 100); t=1/log(2); for (n=1, 200, write("b065618.txt", n, " ", ceil( t*log(n)*2^n/n - 0.0000001)) ) } [From _Harry J. Smith (hjsmithh(AT)sbcglobal.net), _, Oct 24 2009]

Corrected a(4) = 8 (was 9) and added a(34) from _Harry J. Smith (hjsmithh(AT)sbcglobal.net), _, Oct 24 2009

_N. J. A. Sloane (njas(AT)research.att.com), _, Dec 03 2001

Harry J. Smith, <a href="/A065618/b065618.txt">Table of n, a(n) for n=1,...,200</a>

nonn,new

nonn

0, 2, 5, 9, 8, 15, 28, 52, 96, 181, 341, 645, 1224, 2332, 4456, 8535, 16384, 31515, 60729, 117218, 226594, 438637, 850192, 1649843, 3205122, 6232879, 12132353, 23636674, 46088019, 89934783, 175624456, 343195341, 671088640, 1313061078, 2570645474

Harry J. Smith, <a href="b065618.txt">Table of n, a(n) for n=1,...,200</a>

(PARI) { default(realprecision, 100); t=1/log(2); for (n=1, 200, write("b065618.txt", n, " ", ceil( t*log(n)*2^n/n - 0.0000001)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 24 2009]

nonn,new

nonn

Corrected a(4) = 8 (was 9) and added a(34) from Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 24 2009