Question: Solve the recurrence a n = n a n 1 + n ! a n = na n 1 + n ! for n >

Solve the recurrence
a
n
=
n
a
n
1
+
n
!
a
n
=na
n1
+n! for
n
>
0
n>0 with
a
0
=
1
a
0
=1. Give a simple expression for
a
n
a
n
.

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