Question 53165
5,25,61,113,181,265 (N+1)=N-(N-1)+16

20+16=36 & 25+36=61, 61-25=36+16=52 61+52=113, 113-61=52+16=68 113+68=181,

181-113=68+16=84 181+84=265 
straight math addition & subtraction.