a(n) = 388962*n^2 - 347508*n + 77617.

Terms

a(0) =119071a(1) =938449a(2) =2535751a(3) =4910977a(4) =8064127a(5) =11995201a(6) =16704199a(7) =22191121a(8) =28455967a(9) =35498737a(10) =43319431a(11) =51918049a(12) =61294591a(13) =71449057a(14) =82381447a(15) =94091761a(16) =106579999a(17) =119846161a(18) =133890247a(19) =148712257a(20) =164312191a(21) =180690049