A023709 Numbers with no 1's in their base 4 expansion.

0, 2, 3, 8, 10, 11, 12, 14, 15, 32, 34, 35, 40, 42, 43, 44, 46, 47, 48, 50, 51, 56, 58, 59, 60, 62, 63, 128, 130, 131, 136, 138, 139, 140, 142, 143, 160, 162, 163, 168, 170, 171, 172, 174, 175, 176, 178, 179, 184, 186, 187, 188

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• base
• easy

Links

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

Programs

Mathematica

Select[ Range[ 0, 200 ], (Count[ IntegerDigits[ #, 4 ], 1 ]==0)& ]