a(n) = 1 + 2*n + 3*n^2 + 4*n^3 + 5*n^4 + 6*n^5 + 7*n^6 + 8*n^7.

Terms

a(0) =1a(1) =36a(2) =1793a(3) =24604a(4) =167481a(5) =756836a(6) =2620201a(7) =7526268a(8) =18831569a(9) =42374116a(10) =87654321a(11) =169343516a(12) =309160393a(13) =538155684a(14) =899445401a(15) =1451432956a(16) =2271560481a(17) =3460629668a(18) =5147732449a(19) =7495831836a(20) =10708033241a(21) =15034586596a(22) =20780659593