A362642 Number of nonisomorphic magmas with n elements satisfying the equations (xy)y = x and x(yz) = xy.

1, 1, 2, 4, 13, 47, 255, 1810, 18471, 266931

Offset

0,3

Links

Table of n, a(n) for n=0..9.

Crossrefs

Cf. A001329 (magmas), A361720, A362382, A362385, A362643 (labeled case).

Sequence in context: A184177 A005164 A246494 * A334444 A268951 A290722

Adjacent sequences: A362639 A362640 A362641 * A362643 A362644 A362645

Keyword

nonn,more

Author

Andrew Howroyd, Apr 28 2023

Status

approved