1/6 of product of three numbers: n-th prime, previous and following number.

Terms

a(0) =1a(1) =4a(2) =20a(3) =56a(4) =220a(5) =364a(6) =816a(7) =1140a(8) =2024a(9) =4060a(10) =4960a(11) =8436a(12) =11480a(13) =13244a(14) =17296a(15) =24804a(16) =34220a(17) =37820a(18) =50116a(19) =59640a(20) =64824a(21) =82160a(22) =95284a(23) =117480a(24) =152096a(25) =171700a(26) =182104a(27) =204156a(28) =215820a(29) =240464