

A194441


Number of toothpicks or Dtoothpicks added at nth stage to the structure of A194440.


17



0, 1, 2, 4, 4, 4, 4, 8, 8, 4, 4, 8, 12, 16, 8, 16, 16, 4, 4, 8, 12, 16, 16, 24, 26, 24, 12, 20, 28, 40, 20, 32, 32, 4, 4, 8, 12, 16, 16, 24, 26, 24, 20, 32, 40, 64, 40, 48, 54, 40, 12, 20, 32, 48, 48, 64, 70, 76, 30, 44, 64, 88, 44, 64, 64, 4, 4, 8, 12
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,3


COMMENTS

Essentially the first differences of A194440.


LINKS

Table of n, a(n) for n=0..68.
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Index entries for sequences related to toothpick sequences


FORMULA

Conjectures for n = 2^k+j, if 1<=j<=3:
a(2^k1) = 2^k, if k >= 2.
a(2^k+0) = 2^k, if k >= 0.
a(2^k+1) = 4, if k >= 1.
a(2^k+2) = 4, if k >= 1.
a(2^k+3) = 8, if k >= 2.
End of conjectures.


EXAMPLE

If written as a triangle:
0,
1,
2,
4,4,
4,4,8,8,
4,4,8,12,16,8,16,16,
4,4,8,12,16,16,24,26,24,12,20,28,40,20,32,32,
4,4,8,12,16,16,24,26,24,20,32,40,64,40,48,54,40,12,20,...
.
It appears that rows converge to A194696.


CROSSREFS

Cf. A139251, A160121, A160407, A161831, A194271, A194440, A194443, A194445, A194692, A194693, A194696.
Sequence in context: A183226 A235863 A220495 * A220521 A236680 A162798
Adjacent sequences: A194438 A194439 A194440 * A194442 A194443 A194444


KEYWORD

nonn


AUTHOR

Omar E. Pol, Aug 29 2011


EXTENSIONS

More terms from Omar E. Pol, Dec 28 2012


STATUS

approved



