a(n) equals floor(Vc(n) - Vs(n)), where Vc(n) is the volume of the cube with side length n and Vs(n) is the volume of the sphere of diameter n.

A057671

a(n) equals floor(Vc(n) - Vs(n)), where Vc(n) is the volume of the cube with side length n and Vs(n) is the volume of the sphere of diameter n.

Terms

    a(0) =0a(1) =3a(2) =12a(3) =30a(4) =59a(5) =102a(6) =163a(7) =243a(8) =347a(9) =476a(10) =634a(11) =823a(12) =1046a(13) =1307a(14) =1607a(15) =1951a(16) =2340a(17) =2778a(18) =3267a(19) =3811a(20) =4411a(21) =5072a(22) =5796a(23) =6585a(24) =7443a(25) =8373a(26) =9377a(27) =10457a(28) =11618a(29) =12862

External references