Arithmetic Progression

Algebra Level 3

If AnA_n denote the nn-th term of an arithmetic progression and given that A1+A4+A7++A16=147A_1 + A_4 + A_7+\ldots+A_{16} = 147 , Then,

A1+A6+A11+A16=?\large A_1 + A_6 + A_{11} + A_{16} = ?

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