login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A002497 Numbers N in A002809 such that there is rho > 0 such that for all A > 0, A008475(A)-A008475(N) >= rho*log(A/N).
(Formerly M2934 N1180)
1

%I M2934 N1180

%S 3,12,60,420,4620,60060,180180,360360,6126120,116396280,2677114440,

%T 77636318760,2406725881560,89048857617720,3651003162326520

%N Numbers N in A002809 such that there is rho > 0 such that for all A > 0, A008475(A)-A008475(N) >= rho*log(A/N).

%C What is the definition of this sequence? - _Charles R Greathouse IV_, Jan 12 2012

%C Note that A002182 is the sequence of highly composite numbers. - _T. D. Noe_, Jan 12 2012

%C The numbers contain the starred entries on pp. 187-190 of Nicolas. It is a subsequence of A002809 by selecting only elements of a set/property "G" (page 150). G contains all N such that a real, strictly positive rho exists such that for all strictly positive integers A we have l(A)-l(N) >= rho*log(A/N). The function l()=A008475() is defined on page 139. - _R. J. Mathar_, Mar 23 2012

%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H J.-L. Nicolas, <a href="http://smf4.emath.fr/Publications/Bulletin/97/html/">Ordre maximum d'un élément du groupe S(n) des permutations et "highly composite numbers"</a>, Bull. Soc. Math. Française 97 (1969), 129-191.

%K nonn,easy,nice,more

%O 1,1

%A _N. J. A. Sloane_.

%E Edited by _M. F. Hasler_, Mar 29 2015

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 18 14:30 EDT 2018. Contains 313832 sequences. (Running on oeis4.)