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A043176
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Numbers n such that 4 and 7 occur juxtaposed in the base 8 representation of n but not of n-1.
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0
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39, 60, 103, 124, 167, 188, 231, 252, 295, 312, 359, 380, 423, 444, 480, 508, 551, 572, 615, 636, 679, 700, 743, 764, 807, 824, 871, 892, 935, 956, 992, 1020, 1063, 1084, 1127, 1148, 1191, 1212, 1255, 1276, 1319, 1336, 1383
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Select[Range[1500], MemberQ[Sort/@Partition[IntegerDigits[#, 8], 2, 1], {4, 7}]&&!MemberQ[Sort/@Partition[IntegerDigits[#-1, 8], 2, 1], {4, 7}]&] (* From Harvey P. Dale, Oct 20 2011 *)
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CROSSREFS
| Sequence in context: A168530 A050780 A039353 * A043956 A090876 A165461
Adjacent sequences: A043173 A043174 A043175 * A043177 A043178 A043179
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KEYWORD
| nonn,base
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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