Chromatic polynomial pi_n(z) of the helm graph H_n evaluated at z=n.

A147859

Chromatic polynomial pi_n(z) of the helm graph H_n evaluated at z=n.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =5832a(4) =1228800a(5) =384375000a(6) =153080202240

External references