0,1,3,8,18,35,264
May be this question is about identifying a wrong number in the series...
There is a pattern in difference between the consecutive numbers…
0 - 1 : 1 <--- 0^2 + 1
1 - 3 : 2 <--- 1^2 + 1
3 - 8 : 5 <--- 2^2 + 1
8 - 18 : 10 <--- 3^2 + 1
18 - 35 : 17 <--- 4^2 + 1
Next difference should be 5^2 + 1 i.e. 26.
35 - 61 : 26 <--- 5^2 + 1
From above the correct sequence would be: 0,1,3,8,18,35,61
and so, the wrong number is: 264
Option: 5
