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A013932 a(n) is squarefree and is sum of first k squarefrees for some k. 3
1, 3, 6, 11, 17, 34, 58, 87, 123, 166, 215, 274, 305, 407, 482, 521, 562, 647, 791, 899, 1073, 1261, 1327, 1394, 1463, 1533, 1677, 1751, 1906, 1985, 2067, 2235, 2321, 2497, 2681, 2870, 2967, 3170, 3273, 3378 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..40.

MATHEMATICA

Select[Accumulate[Select[Range[150], SquareFreeQ]], SquareFreeQ] (* Harvey P. Dale, Jul 27 2011 *)

CROSSREFS

Cf. A005117, A013930, A013931.

Sequence in context: A109471 A279032 A124454 * A302550 A310117 A161864

Adjacent sequences:  A013929 A013930 A013931 * A013933 A013934 A013935

KEYWORD

nonn

AUTHOR

Henri Lifchitz

STATUS

approved

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Last modified July 22 07:23 EDT 2019. Contains 325216 sequences. (Running on oeis4.)