square it!!!

Number Theory Level pending

Complete the following pattern. 20,90,272,650,1332, _

6540 2450 5560 3425 9870

Lakshay Gulati by Lakshay Gulati , 20, India

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1 solution

Lakshay Gulati
Mar 18, 2015

2^2+(2^2)^2=20 3^2+(3^2)^2=90 . . . 7^2+(7^2)^2=2450

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In general, a n = n 4 + 4 n 3 + 7 n 2 + 6 n + 2 a_n=n^{ 4 }+4n^{ 3 }+7n^{ 2 }+6n+2

Félix de Montemar - 6 years, 2 months ago

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