a(n) = n*(3*n^2 + 6*n + 1).

Terms

a(0) =0a(1) =10a(2) =50a(3) =138a(4) =292a(5) =530a(6) =870a(7) =1330a(8) =1928a(9) =2682a(10) =3610a(11) =4730a(12) =6060a(13) =7618a(14) =9422a(15) =11490a(16) =13840a(17) =16490a(18) =19458a(19) =22762a(20) =26420a(21) =30450a(22) =34870a(23) =39698a(24) =44952a(25) =50650a(26) =56810a(27) =63450a(28) =70588a(29) =78242