Search: id:A030179
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%I A030179
%S A030179 0,0,1,4,16,36,81,144,256,400,625,900,1296,1764,2401,3136,4096,
%T A030179 5184,6561,8100,10000,12100,14641,17424,20736,24336,28561,33124,
%U A030179 38416,44100,50625,57600,65536,73984,83521,93636,104976,116964
%N A030179 Quarter-squares squared: A002620^2.
%C A030179 Conjectured to be crossing number of complete bipartite graph K_{n,n}. 
               Known to be true for n <= 7.
%D A030179 C. Thomassen, Embeddings and minors, pp. 301-349 of R. L. Graham et al., 
               eds., Handbook of Combinatorics, MIT Press.
%H A030179 G. Xiao, <a href="http://wims.unice.fr/~wims/en_tool~number~contfrac.en.html">
               Contfrac</a>
%H A030179 E. Weisstein, <a href="http://mathworld.wolfram.com/ZarankiewiczsConjecture.html">
               Zarankiewicz's Conjecture.html</a>
%F A030179 Floor(n^2/4)^2.
%Y A030179 C. A000241, A002620, A014540.
%Y A030179 Sequence in context: A063755 A166721 A085040 this_sequence A005722 A075408 
               A114268
%Y A030179 Adjacent sequences: A030176 A030177 A030178 this_sequence A030180 A030181 
               A030182
%K A030179 nonn
%O A030179 0,4
%A A030179 N. J. A. Sloane (njas(AT)research.att.com), Jan 10 2002

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