login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A189163 Zero-one sequence based on the sequence n(n+1):  a(A002378(k))=a(k); a(A078358(k))=1-a(k), a(1)=0. 3
1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1

LINKS

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

MATHEMATICA

u[n_] := n(n+1);  (*A002378*)

a[1] = 0; h = 128;

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

d = (Complement[Range[Max[#1]], #1] &)[c]; (*A078358*)

Table[a[d[[n]]] = 1 - a[n], {n, 1, h - 1}]; (*A189163*)

Table[a[c[[n]]] = a[n], {n, 1, h}]   (*A189163*)

Flatten[Position[%, 0]]  (*A189164*)

Flatten[Position[%%, 1]] (*A189165*)

CROSSREFS

Cf. A188967, A189164, A189165.

Sequence in context: A189126 A118268 A143220 * A189129 A267269 A187972

Adjacent sequences:  A189160 A189161 A189162 * A189164 A189165 A189166

KEYWORD

nonn

AUTHOR

Clark Kimberling, Apr 17 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 24 07:42 EDT 2021. Contains 347623 sequences. (Running on oeis4.)