A043626 Numbers whose base-8 representation has exactly 4 runs.

520, 522, 523, 524, 525, 526, 527, 528, 529, 531, 532, 533, 534, 535, 536, 537, 538, 540, 541, 542, 543, 544, 545, 546, 547, 549, 550, 551, 552, 553, 554, 555, 556, 558, 559, 560, 561, 562, 563, 564, 565, 567, 568, 569, 570

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Links

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

Crossrefs

Cf. A007094.

Programs

Mathematica

Select[Range[600],Length[Split[IntegerDigits[#,8]]]==4&] (* Harvey P. Dale, Jun 18 2019 *)