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2^2=2x2=4
3^2=3X3=9
4^2=4x4 =16
2007^2=2007x2007=4028049
2008^2=2008x2008=4032064
=1/6 (2008)(2008+1)(4016+1)
=1/6 (2008)(2009)(4017)
= 2.700.811.204
=4/6 (1004)(1004+1)(2008+1)
=1.351.414.120
jadi jumlahnya = 2.700.811.204 - 1.351.414.120 = 1.349.397.084