|
|
A291197
|
|
Second differences of frac(n/log(n)) rounded, n >= 2.
|
|
1
|
|
|
0, -1, 1, 0, 0, -1, 1, 0, 0, -1, 1, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, 0, -1, 1, 0, 0, 0, 0, -1, 1, 0, 0, 0, -1, 1, 0, 0, 0, 0, -1
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
2
|
|
COMMENTS
|
The second differences are very close to -1, 0 or 1.
Second differences of floor(-n/log(n)). - Robert Israel, Aug 20 2017
|
|
LINKS
|
|
|
MAPLE
|
A0:= [seq(frac(n/log(n)), n=2..100)]:
seq(round(A0[n+2]-2*A0[n+1]+A0[n]), n=1..nops(A0)-2); # Robert Israel, Aug 20 2017
|
|
MATHEMATICA
|
Differences[Table[Floor[-n/Log[n]], {n, 2, 100}], 2] (* Harvey P. Dale, Jan 05 2019 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|