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A043619
Numbers whose base-7 representation has exactly 4 runs.
0
350, 352, 353, 354, 355, 356, 357, 358, 360, 361, 362, 363, 364, 365, 366, 368, 369, 370, 371, 372, 373, 374, 376, 377, 378, 379, 380, 381, 382, 384, 385, 386, 387, 388, 389, 390, 442, 443, 444, 445, 446, 447, 448, 450, 451
OFFSET
1,1
MATHEMATICA
Select[Range[500], Length[Split[IntegerDigits[#, 7]]]==4&] (* Harvey P. Dale, Jun 25 2020 *)
CROSSREFS
Cf. A007093.
Sequence in context: A282341 A285463 A138944 * A249430 A260763 A109761
KEYWORD
nonn,base
STATUS
approved