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 A189212 Zero-one sequence based on the hexagonal numbers:  a(A000384(k))=a(k); a(v(k))=1-a(k), where v=A183218 and a(1)=0. 4
 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1 LINKS MATHEMATICA u[n_] := n(2n-1);  (*A000384*) a[1] = 0; h = 128; c = (u[#1] &) /@ Range[2h]; d = (Complement[Range[Max[#1]], #1] &)[c]; (*A183218*) Table[a[d[[n]]] = 1 - a[n], {n, 1, h - 1}]; (*A189212*) Table[a[c[[n]]] = a[n], {n, 1, h}]   (*A189212*) Flatten[Position[%, 0]]  (*A189213*) Flatten[Position[%%, 1]] (*A189214*) CROSSREFS Cf. A188967, A189213, A189214, A000384. Sequence in context: A189028 A301850 A189031 * A147781 A327216 A288640 Adjacent sequences:  A189209 A189210 A189211 * A189213 A189214 A189215 KEYWORD nonn AUTHOR Clark Kimberling, Apr 18 2011 STATUS approved

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Last modified November 26 10:15 EST 2022. Contains 358356 sequences. (Running on oeis4.)