

A292882


Number of nstep closed paths on the E7 lattice.


2




OFFSET

0,3


COMMENTS

Calculated by brute force computational enumeration.
The moments of the imaginary part of the suitably normalized E7 lattice Green's function.


LINKS



FORMULA

Summed combinatorial expressions and recurrence relations for this sequence exist, but have not been determined. These would allow one to write a differential equation or hypergeometric expression for the E7 lattice Green's function.


EXAMPLE

The 2step walks consist of hopping to one of the 126 minimal vectors of the E7 lattice and then back to the origin.


CROSSREFS



KEYWORD

nonn,walk,more


AUTHOR



STATUS

approved



