1,1

Table of n, a(n) for n=1..50.

Index entries for sequences related to sums of squares

A111900(a(n)) = n.

a(2) = 410 because 410 = 7^2 + 19^2 = 11^2 + 17^2 and this is the smallest number that can be written as the sum of distinct squares of primes in 2 different ways.

Cf. A001248, A048261, A097563, A111900, A121518.

Sequence in context: A280791 A198709 A326209 * A215647 A228242 A036771

Adjacent sequences: A287962 A287963 A287964 * A287966 A287967 A287968

nonn

Ilya Gutkovskiy, Jun 03 2017

approved