Java 8, 78 57 3535 16 bytes

@Mr. Xcoder@Arnauld port

i->System.out.print(i*-~i*>i*(i-~ii+++i)*i/6)

Java 8, 78 57 35 bytes

@Mr. Xcoder port

i->System.out.print(i*-~i*(i-~i)/6)

@Arnauld port

i->i*(i+++i)*i/6

added 6 characters in body

edited Oct 17, 2017 at 12:27

@Mr. Xcoder port

i->{int j=0,l=0;for(;j<=i;l+=j*j++);System>System.out.print(li*-~i*(i-~i);}/6)

i->{int j=0,l=0;for(;j<=i;l+=j*j++);System.out.print(l);}

@Mr. Xcoder port

i->System.out.print(i*-~i*(i-~i)/6)

answered Oct 17, 2017 at 12:18

i->{int j=0,l=0;for(;j<=i;l+=j*j++);System.out.print(l);}