a(n) = n^3-((n-1)^3+(n-2)^3+(n-3)^3).

Terms

a(0) =10a(1) =8a(2) =18a(3) =28a(4) =26a(5) =0a(6) =-62a(7) =-172a(8) =-342a(9) =-584a(10) =-910a(11) =-1332a(12) =-1862a(13) =-2512a(14) =-3294a(15) =-4220a(16) =-5302a(17) =-6552a(18) =-7982a(19) =-9604a(20) =-11430a(21) =-13472a(22) =-15742a(23) =-18252a(24) =-21014a(25) =-24040a(26) =-27342a(27) =-30932a(28) =-34822a(29) =-39024