a(n) = (3*n+7)*n^2.

Terms

a(0) =0a(1) =10a(2) =52a(3) =144a(4) =304a(5) =550a(6) =900a(7) =1372a(8) =1984a(9) =2754a(10) =3700a(11) =4840a(12) =6192a(13) =7774a(14) =9604a(15) =11700a(16) =14080a(17) =16762a(18) =19764a(19) =23104a(20) =26800a(21) =30870a(22) =35332a(23) =40204a(24) =45504a(25) =51250a(26) =57460a(27) =64152a(28) =71344a(29) =79054