What will be the missing number 3, 16, 42, 81, ?, 198

Question

1, 3, 8, 19,42, 89, (_)

Answer 1

117
1 - 16 - 81 - 117

Comments

Dear you!
I need interpretation of your solution. thank you!

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EXCELLENT

Answer 2

Ans = 133
3 - 16 = 13(13 x 1)
16 - 42 = 26 (13 x 2)
42 - 81 = 39 (13 x 3)
81 - 133 = 52 (13 x 4)
133 - 198 = 65 (13 x 5)