login
A044173
Numbers n such that string 5,0 occurs in the base 7 representation of n but not of n-1.
0
35, 84, 133, 182, 231, 245, 280, 329, 378, 427, 476, 525, 574, 588, 623, 672, 721, 770, 819, 868, 917, 931, 966, 1015, 1064, 1113, 1162, 1211, 1260, 1274, 1309, 1358, 1407, 1456, 1505, 1554, 1603, 1617, 1652, 1701, 1715, 1799
OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {5, 0}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Sep 06 2018 *)
CROSSREFS
Sequence in context: A111144 A267555 A201632 * A044554 A156126 A119691
KEYWORD
nonn,base
STATUS
approved