a(n) = 10*n^2+n.

Terms

a(0) =11a(1) =42a(2) =93a(3) =164a(4) =255a(5) =366a(6) =497a(7) =648a(8) =819a(9) =1010a(10) =1221a(11) =1452a(12) =1703a(13) =1974a(14) =2265a(15) =2576a(16) =2907a(17) =3258a(18) =3629a(19) =4020a(20) =4431a(21) =4862a(22) =5313a(23) =5784a(24) =6275a(25) =6786a(26) =7317a(27) =7868a(28) =8439a(29) =9030