OFFSET
1,6
COMMENTS
Colors may be permuted without changing the necklace structure.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..200
EXAMPLE
Necklace structures for n=3..8 are:
a(3) = 1: ABC;
a(4) = 1: ABAC;
a(5) = 1: ABABC;
a(6) = 3: ABABAC, ABACBC, ABCABC;
a(7) = 3: ABABABC, ABABCAC, ABACABC;
a(8) = 7: ABABABAC, ABABACAC, ABABACBC, ABABCABC, ABABCBAC, ABACABAC, ABACBABC.
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Oct 04 2019
EXTENSIONS
Terms a(33) and beyond from Andrew Howroyd, Oct 09 2019
STATUS
approved