Sum of first n cubes; or n-th triangular number squared.

Terms

a(0) =0a(1) =1a(2) =9a(3) =36a(4) =100a(5) =225a(6) =441a(7) =784a(8) =1296a(9) =2025a(10) =3025a(11) =4356a(12) =6084a(13) =8281a(14) =11025a(15) =14400a(16) =18496a(17) =23409a(18) =29241a(19) =36100a(20) =44100a(21) =53361a(22) =64009a(23) =76176a(24) =90000a(25) =105625a(26) =123201a(27) =142884a(28) =164836a(29) =189225