A081029 Highly central numbers: numbers having a centrality higher than that of any larger number.

1, 2, 3, 4, 6, 8, 12, 15, 18, 20, 24, 30, 36, 40, 42, 48, 60, 72, 84, 90, 120, 126, 144, 180, 210, 240

Offset: 1

Author

Matthew Vandermast, Mar 02 2003

Keywords

• nonn

Comments

A subset of A081000.

Crossrefs

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

Formula

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