This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A233763 Number of toothpicks or D-toothpicks added at n-th stage in the structure of the D-toothpick "narrow" triangle of A233762. 2
 0, 1, 2, 2, 4, 2, 4, 5, 8, 2, 4, 6, 12, 6, 8, 11, 16, 2, 4, 6, 12, 14, 16, 18, 24, 10, 8, 14, 28, 14, 16, 23, 32, 2, 4, 6, 12, 14, 16, 20, 32, 24, 20, 22, 40, 30, 40, 39, 48, 18, 8 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Essentially the first differences of A233762. LINKS N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS FORMULA a(2n) = A220523(2n); a(2n+1) = A220523(2n+1) - 2. EXAMPLE Written as an irregular triangle in which the row lengths is A011782 the sequence (starting from 1) begins: 1; 2; 2,4; 2,4,5,8; 2,4,6,12,6,8,11,16; 2,4,6,12,14,16,18,24,10,8,14,28,14,16,23,32; 2,4,6,12,14,16,20,32,24,20,22,40,30,40,39,48,18,8,... Right border gives A000079. CROSSREFS Cf. A000079, A011782, A139251, A220501, A220523, A233761, A233762. Sequence in context: A079314 A060609 A205138 * A109526 A260723 A059214 Adjacent sequences:  A233760 A233761 A233762 * A233764 A233765 A233766 KEYWORD nonn,tabf,more AUTHOR Omar E. Pol, Dec 15 2013 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.