a(n) = n^3*2^n.

Terms

a(0) =0a(1) =2a(2) =32a(3) =216a(4) =1024a(5) =4000a(6) =13824a(7) =43904a(8) =131072a(9) =373248a(10) =1024000a(11) =2725888a(12) =7077888a(13) =17997824a(14) =44957696a(15) =110592000a(16) =268435456a(17) =643956736a(18) =1528823808a(19) =3596091392a(20) =8388608000a(21) =19421724672a(22) =44660948992a(23) =102064193536a(24) =231928233984