Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A087324
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A087324 Numbers n such that n and its 9's complement both have the same prime signature. +0
2
2, 7, 14, 22, 34, 65, 77, 85, 93, 97, 102, 105, 106, 114, 133, 134, 138, 161, 165, 205, 206, 214, 218, 221, 222, 234, 253, 254, 258, 262, 265, 275, 278, 301, 302, 305, 306, 314, 345, 354, 357, 365, 377, 413, 414, 437, 438, 445, 446, 454, 465, 466, 473, 475 (list; graph; listen)
OFFSET

1,1

COMMENT

Conjecture: (1) Sequence is infinite. (2) For every prime signature there corresponds a term in this sequence.

EXAMPLE

34 is a member as 34= 2*17 and its 9's complement (99-34) = 65 = 13*5 both have the prime signature p*q.

34 is a member as 34 = 2*17 and its 9's complement (99-34) = 65 = 13*5 both have the prime signature p*q.

CROSSREFS

Cf. A087325.

Sequence in context: A018349 A018363 A161702 this_sequence A008865 A018392 A051640

Adjacent sequences: A087321 A087322 A087323 this_sequence A087325 A087326 A087327

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 04 2003

EXTENSIONS

Corrected and extended by David Wasserman (wasserma(AT)spawar.navy.mil), May 06 2005

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


AT&T Labs Research