a-1-1-a-2-2-a-n-1-n-1-a-n-2a-n-1-find-a-n-

Question Number 81910 by mr W last updated on 16/Feb/20

a_{1} = 1

a_{2} = 2

a_{n + 1} = (n + 1) a_{n} - 2 a_{n - 1}

f i n d a_{n} = ?

Commented by jagoll last updated on 16/Feb/20

a_{3} = 3 a_{2} - 2 a_{1} = 6 - 2 = 4

a_{4} = 4 a_{3} - 2 a_{2} = 16 - 4 = 12

a_{5} = 5 a_{4} - 2 a_{3} = 60 - 8 = 52

a_{6} = 6 a_{5} - 2 a_{4} = 312 - 24 = 288

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