13691
This number is a prime.
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The smallest prime that is the sum of the squares of first
n triangular numbers with prime indices
(3^2+6^2+15^2+28^2+66^2+91^2 = 13691). [Bajpai]
Submitted: 2017-04-03 20:04:04; Last Modified: 2020-06-15 00:03:15.
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