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

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A097212 Numbers n such that A076078(n) > A076078(m) for all m < n, A076078(n) being the number of sets of distinct positive integers with a least common multiple of n. 3
1, 2, 4, 6, 12, 24, 30, 36, 48, 60, 120, 180, 240, 360, 420, 720, 840, 1260, 1680, 2520, 4620, 5040, 7560, 9240, 10080, 12600, 13860, 15120, 18480, 20160, 25200, 27720, 45360, 50400, 55440, 83160, 110880, 138600, 166320, 221760, 277200, 332640 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

RECORDS transform of A076078. All highly composite numbers (A002182) are members. All members belong to A025487 and A067128.

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

f[n_] := Block[{d = Divisors[n]}, Plus @@ (MoebiusMu[n/d](2^DivisorSigma[0, d] - 1))]; b = 0; l = {}; Do[c = a[n]; If[c > b, b = c; AppendTo[l, n]], {n, 10^6}]; l (from Robert G. Wilson v Aug 13 2004)

CROSSREFS

Cf. A140999 (intersection of A025487 and A067128). [From Matthew Vandermast, Oct 11 2008]

Sequence in context: A073349 A129301 A066523 * A126098 A018894 A168264

Adjacent sequences:  A097209 A097210 A097211 * A097213 A097214 A097215

KEYWORD

nonn

AUTHOR

Matthew Vandermast, Aug 07 2004

EXTENSIONS

More terms from Robert G. Wilson v, Aug 13 2004

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified July 23 08:10 EDT 2014. Contains 244850 sequences.