a(n) = 6561*n^2 - 7732*n + 2278.

Terms

a(0) =1107a(1) =13058a(2) =38131a(3) =76326a(4) =127643a(5) =192082a(6) =269643a(7) =360326a(8) =464131a(9) =581058a(10) =711107a(11) =854278a(12) =1010571a(13) =1179986a(14) =1362523a(15) =1558182a(16) =1766963a(17) =1988866a(18) =2223891a(19) =2472038a(20) =2733307a(21) =3007698a(22) =3295211a(23) =3595846a(24) =3909603a(25) =4236482a(26) =4576483