A023059 k and 2k are anagrams in base 4 (written in base 4).

102, 123, 1002, 1020, 1032, 1203, 1230, 1233, 1302, 1323, 10002, 10020, 10032, 10200, 10221, 10320, 10332, 11022, 11223, 12003, 12030, 12033, 12231, 12300, 12330, 12333, 13002, 13020, 13032, 13203, 13230, 13233, 13302, 13323, 100002, 100020, 100032

Offset

1,1

Links

Table of n, a(n) for n=1..37.

Example

102 * 2 = 210, which uses the same digits, hence 102 is in the sequence.
103 * 2 = 212, which is missing the 0 and the 3, so 103 is not in the sequence.

Mathematica

BaseForm[Select[Range[4096], Sort[IntegerDigits[#, 4]] == Sort[IntegerDigits[2#, 4]] &], 4] (* Alonso del Arte, Nov 10 2018 *)

Crossrefs

Cf. A007090.

Sequence in context: A181986 A107838 A095637 * A015165 A160918 A145578

Adjacent sequences: A023056 A023057 A023058 * A023060 A023061 A023062

Keyword

nonn,base

Author

David W. Wilson

Status

approved