login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A048892 Start of n consecutive integers with distinct number of divisors. 3
1, 1, 4, 9, 45, 76, 270, 2204, 3718, 95499, 590890, 16023339, 16475964, 1745175039, 31287652672, 347321438520 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..16.

Carlos Rivera, Problem 20. Divisors (II) K consecutive numbers with the same number of divisors, The Prime Puzzles and Problems Connection. See Problem 20c.

EXAMPLE

The 5th number of this sequence, 45, means that 45, 46, 47, 48 and 49 all have distinct number of divisors: 6, 4, 2, 10 and 3, respectively.

CROSSREFS

Sequence in context: A149170 A024053 A197970 * A108849 A025558 A298986

Adjacent sequences:  A048889 A048890 A048891 * A048893 A048894 A048895

KEYWORD

nonn,nice,more

AUTHOR

Carlos Rivera

EXTENSIONS

More terms from Jud McCranie

a(15)-a(16) from Donovan Johnson, Feb 17 2010

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 20 15:56 EDT 2022. Contains 353874 sequences. (Running on oeis4.)