

A127707


Number of commutative rings with 1 containing n elements.


12



1, 1, 1, 4, 1, 1, 1, 10, 4, 1, 1, 4, 1, 1, 1, 37, 1, 4, 1, 4, 1, 1, 1, 10, 4, 1, 11, 4, 1, 1, 1, 109, 1, 1, 1, 16, 1, 1, 1, 10, 1, 1, 1, 4, 4, 1, 1, 37, 4, 4, 1, 4, 1, 11, 1, 10, 1, 1, 1, 4, 1, 1, 4
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OFFSET

1,4


COMMENTS

Is this a multiplicative function?
Answer: yes! See the Eric M. Rains link for a proof for the result for all unital rings; restricting to commutative rings does not affect the essence of the proof.  Jianing Song, Feb 02 2020


LINKS



FORMULA



CROSSREFS



KEYWORD

more,nice,nonn,mult


AUTHOR

Hugues Randriam (randriam(AT)enst.fr), Jan 24 2007


EXTENSIONS



STATUS

approved



