Question

What is the sequence of 1,4,12,15,45,48,?

Answer 1

80 and 83 are answers

1,4 = 1, (1+3)

1 + [11(1) + 0] = 12 , (12+3) = 15 = 12,15

12 + [11(2) + 1] = 45 , (45+3) = 48 = 45,48

45 + [11(3) + 2] = 80 , (80+3) = 83 = 80,83

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