Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A130201
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
%I A130201
%S A130201 2,42,56,110,182,342,506,552,702,812,930,992,1190,1332,1640,1722,2162,
%T A130201 2450,2756,2862,2970,3080,3306,3540,3782,4422,4692,4970,5700,6006,6320,
%U A130201 6480,6806,7310,7832,8372,8742,9120,9506,9900
%N A130201 Odious oblong (pronic) numbers.
%F A130201 a(n) = 2*A130202(n). Multiplication by 2 preserves odiousness, hence 
               this sequence is twice odious triangular numbers.
%t A130201 Select[Table[n(n + 1), {n, 100}], OddQ[Plus @@ IntegerDigits[ #, 2]] 
               &]
%Y A130201 Cf. This sequence is the intersection of odious (A000069) and oblong 
               (A002378) numbers.
%Y A130201 Sequence in context: A113634 A098634 A076391 this_sequence A076392 A048373 
               A066563
%Y A130201 Adjacent sequences: A130198 A130199 A130200 this_sequence A130202 A130203 
               A130204
%K A130201 nonn
%O A130201 0,1
%A A130201 Tanya Khovanova (tanyakh(AT)yahoo.com), May 16 2007

    
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 7 23:50 EST 2009. Contains 170430 sequences.


AT&T Labs Research