Ceiling((n+1/n)^3).

Terms

a(0) =8a(1) =16a(2) =38a(3) =77a(4) =141a(5) =235a(6) =365a(7) =537a(8) =757a(9) =1031a(10) =1365a(11) =1765a(12) =2237a(13) =2787a(14) =3421a(15) =4145a(16) =4965a(17) =5887a(18) =6917a(19) =8061a(20) =9325a(21) =10715a(22) =12237a(23) =13897a(24) =15701a(25) =17655a(26) =19765a(27) =22037a(28) =24477a(29) =27091