

A143660


Erroneous version of A170946.


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OFFSET

1,1


COMMENTS

The theory of dessins d'enfants was initiated by A. Grothendieck. "In this work, using the matrix model approach... we listed all the dessins d'enfants with no more than 4 edges. There are two 1edge dessins, both of them are of genus zero, fifteen 2edge dessins, among them only one is of genus 1, twenty 3edge dessins: 14 sperical [sic] and 6 of genus 1 and one hundred seven 4edge dessins: 57 spherical dessins, 46 dessins of genus 1 and 4 dessins of genus 2. The total number of dessins is 134."
Note: The fifteen for n=2 is a typo, it should be 5. The sum: 2+5+20+107=134 adds up if we replace fifteen by 5, and moreover, the section on 2edge dessins lists all 5 (not fifteen) dessins. The correct version of this sequence is given by A170946.  Mark van Hoeij, Jan 23 2011


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KEYWORD

dead


STATUS

approved



