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A168002 Duplicate of A079559. 0


%S 1,0,1,1,0,0,1,1,0,1,1,0,0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0,0,0,1,1,0,1,

%T 1,0,0,1,1,0,1,1,0,0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0,0,0,0,1,1,0,1,1,0,

%U 0,1,1,0,1,1,0,0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0,0,0,1,1,0,1,1,0,0,1,1,0,1,1

%N Duplicate of A079559.

%C Name was: Parity of positive integers of the toothpick sequence in the first quadrant A153000.

%C Same as A079559: reduce the g.f. of A153000 mod 2 to see this. [_Joerg Arndt_, Aug 07 2013]

%H David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="/A000695/a000695_1.pdf">The Toothpick Sequence and Other Sequences from Cellular Automata</a>, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]

%H N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>

%F a(n) = A000035(A153000(n)). - _Omar E. Pol_, Aug 06 2013

%Y Cf. A040051, A079559, A139250, A153000

%K nonn,dead

%O 1,1

%A _Omar E. Pol_, Nov 29 2009

%E More terms from _R. J. Mathar_, Dec 04 2009

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Last modified April 12 19:50 EDT 2021. Contains 342932 sequences. (Running on oeis4.)