OFFSET
1,6
COMMENTS
Old definition was "Number of unique loops in a map of 1 to N vertices, with nondirectional connections between vertices which are factors or multiples of each other".
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..50
EXAMPLE
From Andrew Howroyd, Aug 26 2017: (Start)
Case n=4: The only cycle is 1-2-4.
Case n=6: The 6 cycles are 1-2-4, 1-2-6, 1-3-6, 1-3-6-2, 1-3-6-2-4, 1-6-2-4.
(End)
CROSSREFS
KEYWORD
nonn,obsc
AUTHOR
David Eaton (dave(AT)suave.net), Jun 19 2009
EXTENSIONS
Partially edited by N. J. A. Sloane, Dec 21 2014
Name clarified, a(21) corrected and a(25)-a(40) from Andrew Howroyd, Aug 26 2017
STATUS
approved