OFFSET
0,9
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 0..10000
MAPLE
Digits:=50:
ft:=proc(n, t) local k, j;
j:=(n mod t); k:=(n-j)/t;
round(evalf(k*sin(sqrt(k)+j*Pi/2)));
end;
[seq(ft(n, 4), n=0..120)];
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jun 11 2016
EXTENSIONS
Definition corrected by N. J. A. Sloane, Jun 20 2016
STATUS
approved