A366202 - OEIS

A366202

Numbers x such that (x^2 AND x) is not a square, where AND is the bitwise logical-and operation.

21, 23, 25, 39, 42, 43, 45, 47, 49, 51, 55, 58, 73, 75, 78, 79, 83, 85, 86, 87, 91, 93, 95, 97, 99, 101, 103, 106, 107, 109, 110, 111, 113, 115, 117, 122, 140, 141, 142, 143, 149, 150, 151, 153, 154, 155, 158, 159, 162, 163, 166, 167, 169, 170, 171, 172, 175

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Numbers x such that A213541(x) is not in A000290.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[200], !IntegerQ[Sqrt[BitAnd[#^2, #]]]&] (* Harvey P. Dale, Nov 17 2024 *)

CROSSREFS

Cf. A000290, A213541.

Sequence in context: A095443 A095441 A095437 * A089787 A329914 A229221