A236146 - OEIS

A236146

Number of primitive quandles of order n, up to isomorphism. A quandle is primitive if its inner automorphism groups acts primitively on it.

1, 0, 1, 1, 3, 0, 5, 2, 3, 1, 9, 0, 11, 1, 3, 15, 0, 17, 0, 1, 0, 21, 0, 10, 0, 8, 2, 27, 0, 29, 6, 0, 0, 0

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,5

COMMENTS

Since a primitive quandle is connected, we have a(n) <= A181771(n) for all n.

Furthermore, since a primitive quandle is simple, we have a(n) <= A196111(n) for all n.

LINKS

FORMULA

For odd primes p, a(p) = p - 2.

CROSSREFS

KEYWORD

nonn,hard,more

AUTHOR

STATUS

approved