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A031467
Numbers whose base-4 representation has 2 fewer 0's than 3's.
0
15, 31, 47, 55, 59, 61, 62, 95, 111, 119, 123, 125, 126, 159, 175, 183, 187, 189, 190, 207, 215, 219, 221, 222, 231, 235, 237, 238, 243, 245, 246, 249, 250, 252, 319, 351, 367, 375, 379, 381, 382, 415, 431, 439, 443, 445, 446
OFFSET
1,1
MATHEMATICA
Select[Range[500], DigitCount[#, 4, 0]==DigitCount[#, 4, 3]-2&] (* Harvey P. Dale, Oct 08 2020 *)
CROSSREFS
Cf. A007090.
Sequence in context: A042017 A043346 A023719 * A045063 A044076 A319282
KEYWORD
nonn,base
STATUS
approved