a(n) = 27225*n^2 - 51302*n + 24168.

Terms

a(0) =91a(1) =30464a(2) =115287a(3) =254560a(4) =448283a(5) =696456a(6) =999079a(7) =1356152a(8) =1767675a(9) =2233648a(10) =2754071a(11) =3328944a(12) =3958267a(13) =4642040a(14) =5380263a(15) =6172936a(16) =7020059a(17) =7921632a(18) =8877655a(19) =9888128a(20) =10953051a(21) =12072424a(22) =13246247a(23) =14474520a(24) =15757243a(25) =17094416