The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A323647 Number of elements added at n-th stage to the toothpick structure of A323646. 4
 1, 2, 2, 4, 6, 6, 6, 12, 14, 12, 6, 12, 14, 16, 18, 32, 34, 20, 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 36, 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 40, 18, 32, 38, 44, 62, 92, 86, 60, 62, 96, 114, 144, 210, 260, 194, 68, 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The "word" of this cellular automaton is "ab", but note that this triangle has an unusual structure: an additional row of length 2. For more information about the word of cellular automata see A296612. 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,a,b; ... Row lengths give 2 together with the terms of A011782 multiplied by 2, also 2 togheter with the column 2 of A296612. Columns "a" contain numbers of toothpicks of length 2. Columns "b" contain numbers of D-toothpicks of length 2*sqrt(2). See the example. LINKS Table of n, a(n) for n=1..80. N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS Index entries for sequences related to cellular automata Index entries for sequences related to toothpick sequences EXAMPLE Triangle begins: 1, 2; 2, 4; 6, 6; 6,12,14,12; 6,12,14,16,18,32,34,20; 6,12,14,16,18,32,34,24,18,32,38,44,62,92,82,36; 6,12,14,16,18,32,34,24,18,32,38,44,62,92,82,40,18,32,38,44,62,92,86,60,62,96, ... CROSSREFS First differences of A323646. Also, 1 together with A160731. Column 1 gives A134201. Cf. A011782, A139251, A296612. For other hybrid cellular automata, see A194271, A194701, A220501, A289841, A290221, A294021, A294963, A294981, A299771, A323651, A327331, A327333. Sequence in context: A338276 A062722 A160731 * A302928 A098214 A178883 Adjacent sequences: A323644 A323645 A323646 * A323648 A323649 A323650 KEYWORD nonn,tabf AUTHOR Omar E. Pol, Mar 07 2019 STATUS approved

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

Last modified June 12 15:44 EDT 2024. Contains 373332 sequences. (Running on oeis4.)