a(n) = Pochhammer(n, 5) / 2.

Terms

a(0) =0a(1) =60a(2) =360a(3) =1260a(4) =3360a(5) =7560a(6) =15120a(7) =27720a(8) =47520a(9) =77220a(10) =120120a(11) =180180a(12) =262080a(13) =371280a(14) =514080a(15) =697680a(16) =930240a(17) =1220940a(18) =1580040a(19) =2018940a(20) =2550240a(21) =3187800a(22) =3946800a(23) =4843800a(24) =5896800a(25) =7125300a(26) =8550360a(27) =10194660a(28) =12082560a(29) =14240160