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A013930 Sum of first a(n) squarefrees is squarefree. 3

%I

%S 1,2,3,4,5,7,9,11,13,15,17,19,20,23,25,26,27,29,32,34,37,40,41,42,43,

%T 44,46,47,49,50,51,53,54,56,58,60,61,63,64,65,69,70,71,74,76,77,79,80,

%U 81,82,83,84,86,88,89,90,92,94,95,96,98,100,102,103,104,106,107,108,110,111

%N Sum of first a(n) squarefrees is squarefree.

%Y Cf. A005117, A013931, A013932.

%K nonn

%O 1,2

%A _Henri Lifchitz_

%E More terms from _David W. Wilson_

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Last modified July 23 19:33 EDT 2019. Contains 325263 sequences. (Running on oeis4.)