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A230124 Squarefree evil numbers. 1
3, 5, 6, 10, 15, 17, 23, 29, 30, 33, 34, 39, 43, 46, 51, 53, 57, 58, 65, 66, 71, 77, 78, 83, 85, 86, 89, 95, 101, 102, 105, 106, 111, 113, 114, 119, 123, 129, 130, 139, 141, 142, 149, 154, 159, 163, 165, 166, 170, 177, 178, 183, 187, 190, 195, 197, 201, 202, 209, 210, 215 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

evilQ[n_] := EvenQ @ DigitCount[n, 2][[1]]; Select[Range[200], evilQ[#] && SquareFreeQ[#] &] (* Amiram Eldar, Dec 10 2019 *)

PROG

(PARI) is(n)=hammingweight(n)%2==0 && issquarefree(n) \\ Charles R Greathouse IV, Mar 18 2014

CROSSREFS

Intersection of A001969 and A005117.

Sequence in context: A112926 A176747 A238488 * A027627 A194466 A270416

Adjacent sequences:  A230121 A230122 A230123 * A230125 A230126 A230127

KEYWORD

nonn,base

AUTHOR

Irina Gerasimova, Oct 10 2013

EXTENSIONS

Corrected by R. J. Mathar, Oct 12 2013

STATUS

approved

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Last modified November 28 19:48 EST 2021. Contains 349415 sequences. (Running on oeis4.)