If 1 + 2 = 13; 2 + 3 = 61; 3 + 4 = 193 Then 4 +5 = ?

Question

Which number will replace the "?" and complete the sequence?

1; 1; 2; 4; 3; 9; 4; 61; 5; 52; 6; 63; 7; ?

Answer 1

(1x2)^2+(1+2)x2+(1+2)=13
(2x3)^2+(2+3)x4+(2+3)=61
(3x4)^2+(3+4)x6+(3+4)=193
(4x5)^2+(4+5)x8+(4+5)=481
Ans: 481