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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A126888 a(n) is the smallest positive integer such that floor(a(n)/d(a(n))) = n, where d(m) is the number of positive divisors of m. 4
1, 5, 7, 28, 11, 13, 44, 17, 19, 63, 23, 51, 55, 29, 31, 49, 69, 37, 77, 41, 43, 91, 47, 147, 153, 53, 111, 115, 59, 61, 125, 129, 67, 207, 71, 73, 296, 155, 79, 121, 83, 680, 261, 89, 183, 185, 284, 97, 399, 101, 103, 209, 107, 109, 221, 113, 459, 235, 237, 363, 247, 249 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Is a(n) well-defined? Does every positive integer n equal floor(m/d(m)) for some m?

LINKS

Hugo van der Sanden and D. W. Wilson, Table of n, a(n) for n = 1..10000

MATHEMATICA

f[n_] := Block[{k = 1}, While[Floor[k/Length[Divisors[k]]] != n, k++ ]; k]; Table[f[n], {n, 62}] (* Ray Chandler, Jan 04 2007 *)

CROSSREFS

Cf. A000005, A126889, A078709, A125056, A125057.

Sequence in context: A144392 A268701 A317166 * A185302 A179305 A307100

Adjacent sequences:  A126885 A126886 A126887 * A126889 A126890 A126891

KEYWORD

nonn

AUTHOR

Leroy Quet, Dec 30 2006

EXTENSIONS

Extended by Ray Chandler, Jan 04 2007

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 18 17:45 EST 2019. Contains 329287 sequences. (Running on oeis4.)