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A188079
[nr]-[kr]-[nr-kr], where r=sqrt(3), k=6, [ ]=floor.
3
0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1
OFFSET
1
COMMENTS
See A188014.
FORMULA
a(n)=[nr]-[6r]-[nr-6r], where r=sqrt(3)
MATHEMATICA
r=3^(1/2)); k=6;
t=Table[Floor[n*r]-Floor[(n-k)*r]-Floor[k*r], {n, 1, 220}] (*A188079*)
Flatten[Position[t, 0]] (*A188080*)
Flatten[Position[t, 1]] (*A188081*)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Mar 20 2011
STATUS
approved