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A044170
Numbers n such that string 4,4 occurs in the base 7 representation of n but not of n-1.
0
32, 81, 130, 179, 224, 277, 326, 375, 424, 473, 522, 567, 620, 669, 718, 767, 816, 865, 910, 963, 1012, 1061, 1110, 1159, 1208, 1253, 1306, 1355, 1404, 1453, 1502, 1551, 1568, 1649, 1698, 1747, 1796, 1845, 1894, 1939, 1992
OFFSET
1,1
MATHEMATICA
Select[Range[2000], MemberQ[Partition[IntegerDigits[#, 7], 2, 1], {4, 4}] && !MemberQ[Partition[IntegerDigits[#-1, 7], 2, 1], {4, 4}]&] (* Harvey P. Dale, Jan 17 2014 *)
CROSSREFS
Sequence in context: A203447 A340701 A043410 * A044551 A256810 A256803
KEYWORD
nonn,base
STATUS
approved