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A211010
Value on the axis "x" of the endpoint of the structure of A211000 at n-th stage.
11
0, 1, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3
OFFSET
0,3
COMMENTS
For the values on the axis "y" see A211011.
Also [0, 1] together with the absolute values of A131731.
FORMULA
From Colin Barker, Sep 15 2013: (Start)
a(n) = (6+(-i)^n+i^n)/2 where n > 1, i=sqrt(-1).
a(n) = a(n-1) - a(n-2) + a(n-3) for n > 4.
G.f.: -x*(x+1)*(2*x^2+1) / ((x-1)*(x^2+1)). (End)
MATHEMATICA
A211010[nmax_]:=PadRight[{0, 1, 2, 3}, nmax+1, {4, 3, 2, 3}];
A211010[100] (* Paolo Xausa, Jan 06 2023 *)
CROSSREFS
Bisection of A211000.
Cf. A211011 (the y's in A211000).
Sequence in context: A214551 A371769 A343435 * A131731 A255480 A356014
KEYWORD
nonn,easy
AUTHOR
Omar E. Pol, Mar 30 2012
STATUS
approved