Number of perfect matchings in graph P_{7} X P_{2n}.

A028469

Number of perfect matchings in graph P_{7} X P_{2n}.

Terms

    a(0) =1a(1) =21a(2) =781a(3) =31529a(4) =1292697a(5) =53175517a(6) =2188978117a(7) =90124167441

External references