|
|
A044303
|
|
Numbers n such that string 5,7 occurs in the base 9 representation of n but not of n-1.
|
|
0
|
|
|
52, 133, 214, 295, 376, 457, 468, 538, 619, 700, 781, 862, 943, 1024, 1105, 1186, 1197, 1267, 1348, 1429, 1510, 1591, 1672, 1753, 1834, 1915, 1926, 1996, 2077, 2158, 2239, 2320, 2401, 2482, 2563, 2644, 2655, 2725, 2806
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
MATHEMATICA
|
Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {5, 7}]>0, 1, 0], {n, 3000}], {0, 1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, Nov 26 2015 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|