Number of 2-factors in P_5 X P_2n.

A003776

Number of 2-factors in P_5 X P_2n.

Terms

    a(0) =3a(1) =54a(2) =1140a(3) =24360a(4) =521064a(5) =11146656a(6) =238452456a(7) =5101047216a(8) =109123156248

External references