4-dimensional figurate numbers: a(n) = n*binomial(n+2, 3).

Terms

a(0) =1a(1) =8a(2) =30a(3) =80a(4) =175a(5) =336a(6) =588a(7) =960a(8) =1485a(9) =2200a(10) =3146a(11) =4368a(12) =5915a(13) =7840a(14) =10200a(15) =13056a(16) =16473a(17) =20520a(18) =25270a(19) =30800a(20) =37191a(21) =44528a(22) =52900a(23) =62400a(24) =73125a(25) =85176a(26) =98658a(27) =113680a(28) =130355a(29) =148800