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A194435
Number of toothpicks or D-toothpicks added at n-th stage to the structure of A194434.
5
0, 4, 8, 16, 16, 16, 32, 44, 32, 16, 32, 64, 96, 48, 80, 100, 64, 16, 32, 64, 96, 112, 144, 168, 176, 80, 96, 160, 256, 128, 176, 212, 128, 16, 32, 64, 96, 112, 144, 176, 208, 168, 192, 240, 400, 272, 336, 332, 336, 112, 96, 176, 288, 336, 416, 464
OFFSET
0,2
COMMENTS
Essentially the first differences of A194434.
First differs from A221528 at a(13). - Omar E. Pol, Mar 23 2013
From Omar E. Pol, Jun 24 2022: (Start)
The word of this cellular automaton is "ab".
For the nonzero terms the structure of the irregular triangle is as shown below:
a,b;
a,b;
a,b,a,b;
a,b,a,b,a,b,a,b;
a,b,a,b,a,b,a,b,a,b,a,b,a,b,a,b;
...
Row lengths are the terms of A011782 multiplied by 2, also the column 2 of A296612.
Columns "a" contain numbers of D-toothpicks (of length sqrt(2)).
Columns "b" contain numbers of toothpicks (of length 1).
An associated sound to the animation could be (tick, tock), (tick, tock), ..., the same as the ticking clock sound.
For further information about the word of cellular automata see A296612. (End)
FORMULA
a(n) = 4*A194445(n).
Conjecture: a(2^k+1) = 16, if k >= 1.
EXAMPLE
From Omar E. Pol, Mar 23 2013: (Start)
When written as an irregular triangle the sequence of nonzeros terms begins:
4, 8;
16,16;
16,32,44,32;
16,32,64,96, 48, 80,100, 64;
16,32,64,96,112,144,168,176, 80, 96,160,256,128,176,212,128;
16,32,64,96,112,144,176,208,168,192,240,400,272,336,332,336,112,96, ...
... (End)
Right border gives the powers of 2 >= 8 (reformatted the triangle). - Omar E. Pol, Jun 24 2022
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Sep 03 2011
EXTENSIONS
More terms from Omar E. Pol, Mar 23 2013
STATUS
approved