a(n) = (7*n+1)*(7*n+2)*(7*n+4).

Terms

a(0) =8a(1) =792a(2) =4320a(3) =12650a(4) =27840a(5) =51948a(6) =87032a(7) =135150a(8) =198360a(9) =278720a(10) =378288a(11) =499122a(12) =643280a(13) =812820a(14) =1009800a(15) =1236278a(16) =1494312a(17) =1785960a(18) =2113280a(19) =2478330a(20) =2883168a(21) =3329852a(22) =3820440a(23) =4356990a(24) =4941560a(25) =5576208a(26) =6262992a(27) =7003970a(28) =7801200a(29) =8656740