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A350873 a(n) is the number of non-isomorphic flexible magmas with n elements (i.e., number of magmas with n elements which satisfy the identity (xy)x = x(yx) for all x and y). 3
1, 1, 6, 191, 72148 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
Wikipedia, Flexible algebra
EXAMPLE
There are 10 non-isomorphic magmas with 2 elements, and 6 of these are flexible magmas, so a(2) = 6.
CROSSREFS
Cf. A001329 (magmas), A027851.
Sequence in context: A222016 A059491 A024279 * A182788 A232214 A012205
KEYWORD
nonn,hard,more
AUTHOR
Joel Brennan, Jan 20 2022
STATUS
approved

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)