The arithmetic mean of the n-th and (n+1)-st cubes, rounded down.

Terms

a(0) =0a(1) =4a(2) =17a(3) =45a(4) =94a(5) =170a(6) =279a(7) =427a(8) =620a(9) =864a(10) =1165a(11) =1529a(12) =1962a(13) =2470a(14) =3059a(15) =3735a(16) =4504a(17) =5372a(18) =6345a(19) =7429a(20) =8630a(21) =9954a(22) =11407a(23) =12995a(24) =14724a(25) =16600a(26) =18629a(27) =20817a(28) =23170a(29) =25694