1+2+2+3+3+3+4+4+4+4+.+100+100+100.
1+2+2+3+3+3+4+4+4+4+.+100+100+100.
=1^2+2^2+3^2+… +100^2
=100(100+1)(200+1)/6
=338350
Sum of squares formula
RELATED INFORMATIONS
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