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A089925 Number of commutative loops (quasigroups with an identity element) of order n. 1
1, 1, 1, 2, 1, 8, 17, 2265, 30583 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..9.

Index entries for sequences related to quasigroups

CROSSREFS

Cf. A057771.

Sequence in context: A121360 A199928 A047688 * A235047 A120945 A235048

Adjacent sequences:  A089922 A089923 A089924 * A089926 A089927 A089928

KEYWORD

nonn

AUTHOR

Christian G. Bower and Juergen Buntrock (jubu(AT)jubu.com), Nov 14 2003.

EXTENSIONS

a(9) from Michael Thwaites (michael.thwaites(AT)ucop.edu), Jan 23 2004

STATUS

approved

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Last modified June 16 14:56 EDT 2019. Contains 324152 sequences. (Running on oeis4.)