a(n) = n*(2*n^2 - 2*n + 1).

Terms

a(0) =0a(1) =1a(2) =10a(3) =39a(4) =100a(5) =205a(6) =366a(7) =595a(8) =904a(9) =1305a(10) =1810a(11) =2431a(12) =3180a(13) =4069a(14) =5110a(15) =6315a(16) =7696a(17) =9265a(18) =11034a(19) =13015a(20) =15220a(21) =17661a(22) =20350a(23) =23299a(24) =26520a(25) =30025a(26) =33826a(27) =37935a(28) =42364a(29) =47125