A number theory problem by hritik agarwal
Number Theory
Level
2
Find sum of a and b in series.
5,6,15,40,89,a,b...
The answer is 461.
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1 solution
5+1^2 = 6
6+3^2 = 15
15+5^2 = 40
40+7^2 = 89
89+9^2 = 170
170+11^2 = 291
So a+b=170+291=461