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Highly central numbers: numbers having a centrality higher than that of any larger number.
3

%I #3 Mar 30 2012 17:27:18

%S 1,2,3,4,6,8,12,15,18,20,24,30,36,40,42,48,60,72,84,90,120,126,144,

%T 180,210,240

%N Highly central numbers: numbers having a centrality higher than that of any larger number.

%C A subset of A081000.

%F Formula for centrality of n: A018804(n)/n^2 (cf. A080997 for fuller description of this concept).

%Y Cf. A080997, A080998 for centrality rankings of the positive integers.

%K nonn

%O 1,2

%A _Matthew Vandermast_, Mar 02 2003