A023713 Numbers with no 2's in their base 4 expansion.

0, 1, 3, 4, 5, 7, 12, 13, 15, 16, 17, 19, 20, 21, 23, 28, 29, 31, 48, 49, 51, 52, 53, 55, 60, 61, 63, 64, 65, 67, 68, 69, 71, 76, 77, 79, 80, 81, 83, 84, 85, 87, 92, 93, 95, 112, 113, 115, 116, 117, 119, 124, 125, 127, 192, 193, 195, 196

Offset

1,3

Links

Seiichi Manyama, Table of n, a(n) for n = 1..10000

Mathematica

Select[ Range[ 0, 200 ], (Count[ IntegerDigits[ #, 4 ], 2 ]==0)& ]

Crossrefs

Sequence in context: A322991 A120635 A300841 * A032890 A092859 A173444

Adjacent sequences: A023710 A023711 A023712 * A023714 A023715 A023716

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved