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Recursion
hard
0:00.0
Find
a
2
a_2
a
2
if
a
n
=
(
a
n
−
1
)
2
+
1
a_n = (a_{n-1})^2 + 1
a
n
=
(
a
n
−
1
)
2
+
1
and
a
0
=
1
a_0 = 1
a
0
=
1
.
A
3
B
2
C
5
D
10
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