|
|
A044399
|
|
Numbers n such that string 6,7 occurs in the base 10 representation of n but not of n-1.
|
|
0
|
|
|
67, 167, 267, 367, 467, 567, 667, 670, 767, 867, 967, 1067, 1167, 1267, 1367, 1467, 1567, 1667, 1670, 1767, 1867, 1967, 2067, 2167, 2267, 2367, 2467, 2567, 2667, 2670, 2767, 2867, 2967, 3067, 3167, 3267, 3367, 3467, 3567
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
MATHEMATICA
|
Select[Range[4000], MemberQ[Partition[IntegerDigits[#], 2, 1], {6, 7}] && !MemberQ[Partition[IntegerDigits[#-1], 2, 1], {6, 7}]&] (* Harvey P. Dale, Sep 24 2013 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|