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A189203 Zero-one sequence based on the sequence n(n+1)(2n+1)/6:  a(A000330(k))=a(k); a(v(k))=1-a(k), where v=complement(A000330) and a(1)=0. 3
0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 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, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1

LINKS

Table of n, a(n) for n=1..135.

MATHEMATICA

u[n_] := n(n+1)/(2n+1)/6; (*A000330*)

a[1] = 0; a[2]=1; h = 128;

c = (u[#1] &) /@ Range[2h];

d = (Complement[Range[Max[#1]], #1] &)[c];

Table[a[d[[n]]] = 1 - a[n], {n, 1, h - 1}]; (*A189203*)

Table[a[c[[n]]] = a[n], {n, 1, h}]   (*A189203*)

Flatten[Position[%, 0]]  (*A189204*)

Flatten[Position[%%, 1]] (*A189205*)

CROSSREFS

Cf. A188967, A189204, A189205.

Sequence in context: A189014 A189017 A189132 * A296028 A165263 A108737

Adjacent sequences:  A189200 A189201 A189202 * A189204 A189205 A189206

KEYWORD

nonn

AUTHOR

Clark Kimberling, Apr 18 2011

STATUS

approved

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Last modified November 17 18:24 EST 2019. Contains 329241 sequences. (Running on oeis4.)