|
|
A044387
|
|
Numbers n such that string 5,5 occurs in the base 10 representation of n but not of n-1.
|
|
0
|
|
|
55, 155, 255, 355, 455, 550, 655, 755, 855, 955, 1055, 1155, 1255, 1355, 1455, 1550, 1655, 1755, 1855, 1955, 2055, 2155, 2255, 2355, 2455, 2550, 2655, 2755, 2855, 2955, 3055, 3155, 3255, 3355, 3455, 3550, 3655, 3755, 3855
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
MATHEMATICA
|
SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {5, 5}]>0, 1, 0], {n, 4000}], {0, 1}][[All, 2]] (* Harvey P. Dale, Aug 13 2021 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|