A double binomial sum involving absolute values.

A268151

A double binomial sum involving absolute values.

Terms

    a(0) =0a(1) =40a(2) =2816a(3) =104448a(4) =3014656a(5) =76021760a(6) =1761607680a(7) =38520487936a(8) =807453851648

External references