Alternating sum of cubes, i.e., Sum_{k=0..n} k^p*q^k for p=3, q=-1.

Terms

a(0) =0a(1) =-1a(2) =7a(3) =-20a(4) =44a(5) =-81a(6) =135a(7) =-208a(8) =304a(9) =-425a(10) =575a(11) =-756a(12) =972a(13) =-1225a(14) =1519a(15) =-1856a(16) =2240a(17) =-2673a(18) =3159a(19) =-3700a(20) =4300a(21) =-4961a(22) =5687a(23) =-6480a(24) =7344a(25) =-8281a(26) =9295a(27) =-10388a(28) =11564a(29) =-12825