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A219115 Numbers whose squares have at least one 1 and one 2 in ternary representation. 0
4, 5, 7, 8, 10, 12, 13, 14, 15, 17, 20, 21, 22, 23, 24, 25, 26, 28, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 56, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 82, 84 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

So a(n)^2 belongs to A125293.

Complement of A176189.

LINKS

Table of n, a(n) for n=1..66.

K. Mahler, The representation of squares to the base 3, Acta Arith. Vol. 53, Issue 1 (1989), p. 99-106.

MATHEMATICA

Select[Range[100], DigitCount[#^2, 3, 1]>0&&DigitCount[#^2, 3, 2]>0&] (* Harvey P. Dale, May 07 2015 *)

CROSSREFS

Cf. A125293, A176189.

Sequence in context: A078577 A225387 A037259 * A118731 A076203 A153327

Adjacent sequences:  A219112 A219113 A219114 * A219116 A219117 A219118

KEYWORD

nonn,base

AUTHOR

Michel Marcus, Nov 12 2012

STATUS

approved

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)