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A043470
Numbers having two 4's in base 9.
0
40, 121, 202, 283, 328, 337, 346, 355, 360, 361, 362, 363, 365, 366, 367, 368, 373, 382, 391, 400, 445, 526, 607, 688, 769, 850, 931, 1012, 1057, 1066, 1075, 1084, 1089, 1090, 1091, 1092, 1094, 1095, 1096, 1097, 1102, 1111, 1120
OFFSET
1,1
MATHEMATICA
Select[Range[1200], DigitCount[#, 9, 4]==2&] (* Harvey P. Dale, Jun 10 2023 *)
CROSSREFS
Cf. A007095.
Sequence in context: A199810 A185762 A234914 * A044291 A044672 A044969
KEYWORD
nonn,base
STATUS
approved