1,2

Table of n, a(n) for n=1..11.

Sequence A007664 gives the lengths of the geodesics being counted by the present sequence (conjecturally this is true for all n; experimentally it is true for the first 20 terms)

Sequence in context: A153438 A190632 A036110 * A118454 A118326 A212847

Adjacent sequences: A143804 A143805 A143806 * A143808 A143809 A143810

hard,nonn

Jason Behrstock (jason(AT)math.columbia.edu), Sep 01 2008

approved