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A043348
Numbers having four 3's in base 4.
0
255, 511, 767, 831, 895, 959, 975, 991, 1007, 1011, 1015, 1019, 1020, 1021, 1022, 1279, 1535, 1791, 1855, 1919, 1983, 1999, 2015, 2031, 2035, 2039, 2043, 2044, 2045, 2046, 2303, 2559, 2815, 2879, 2943, 3007, 3023, 3039
OFFSET
1,1
MATHEMATICA
Select[Range[3100], DigitCount[#, 4, 3]==4&] (* Harvey P. Dale, Jun 09 2017 *)
CROSSREFS
Cf. A007090.
Sequence in context: A182221 A053339 A031197 * A031469 A045065 A158250
KEYWORD
nonn,base
STATUS
approved