A189169 Zero-one sequence based on the sequence n(n+2): a(A005563(k))=a(k); a(A183299(k))=1-a(k), a(1)=0, a(2)=1.

1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0

Offset

1

Links

Table of n, a(n) for n=1..97.

Mathematica

u[n_] := n(n+2);  (*A005563*)
a[1] = 0; a[2]=1; h = 128;
c = (u[#1] &) /@ Range[2h];
d = (Complement[Range[Max[#1]], #1] &)[c]; (*A183299*)
Table[a[d[[n]]] = 1 - a[n], {n, 1, h - 1}]; (*A189169*)
Table[a[c[[n]]] = a[n], {n, 1, h}]   (*A189169*)
Flatten[Position[%, 0]]  (*A189170*)
Flatten[Position[%%, 1]] (*A189171*)

Crossrefs

Cf. A188967, A189170, A189171, A189166.

Sequence in context: A087003 A266840 A104606 * A267676 A014389 A014349

Adjacent sequences: A189166 A189167 A189168 * A189170 A189171 A189172

Keyword

nonn

Author

Clark Kimberling, Apr 17 2011

Status

approved