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
Robert Israel, Table of n, a(n) for n = 2..10000
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
Simon Plouffe, Aug 20 2017
STATUS
approved