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A043482
Numbers having two 7's in base 9.
0
70, 151, 232, 313, 394, 475, 556, 574, 583, 592, 601, 610, 619, 628, 630, 631, 632, 633, 634, 635, 636, 638, 646, 718, 799, 880, 961, 1042, 1123, 1204, 1285, 1303, 1312, 1321, 1330, 1339, 1348, 1357, 1359, 1360, 1361, 1362, 1363
OFFSET
1,1
MATHEMATICA
Select[Range[1500], DigitCount[#, 9, 7]==2&] (* Harvey P. Dale, Jan 16 2015 *)
CROSSREFS
Cf. A007095.
Sequence in context: A044574 A255794 A181465 * A044321 A044702 A063320
KEYWORD
nonn,base
STATUS
approved