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%I #20 Apr 03 2023 10:36:10
%S 10,5063,14573,17098,1916357,468726713734
%N Numbers k such that k^2 is the sum of the first m primes for some m.
%H G. L. Honaker Jr. and C. Caldwell, <a href="https://t5k.org/curios/page.php?curio_id=179">Prime Curios!: 9</a>
%H Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_009.htm">Problem 9: Sum of first k primes is perfect square</a>, The Prime Puzzles and Problems Connection.
%F a(n)^2 = A061890(n).
%e 10^2 = 2+3+5+7+11+13+17+19+23, so 10 is in the sequence.
%Y Cf. A033997, A033998, A061890.
%K nonn,hard,more
%O 1,1
%A _David W. Wilson_, May 12 2001
%E a(6) from _Giovanni Resta_, May 27 2003
%E Edited by _Ray Chandler_, Mar 20 2007