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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A135058 Least m such that both m and m+n have exactly n prime factors, ignoring multiplicity. 4
1, 2, 10, 102, 1326, 96135, 607614, 159282123, 9617162170, 1110180535035, 28334309296920, 16513791577659519, 271518698440871310 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

a(13) <= 592357638037885411965. If we change "exactly n" to "at least n", the sequence is still the same at least through a(12).

EXAMPLE

a(3) = 102 because 102 and 105 each have three prime factors.

CROSSREFS

Cf. A097978, A098515.

Sequence in context: A036336 A070842 A086927 * A154256 A005799 A000595

Adjacent sequences:  A135055 A135056 A135057 * A135059 A135060 A135061

KEYWORD

hard,nonn

AUTHOR

David Wasserman (dwasserm(AT)earthlink.net), Feb 11 2008

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

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

Last modified February 14 16:36 EST 2012. Contains 205635 sequences.