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!)
 A171173 Triangle read by rows in which row n lists A033627(n) together with the first 2n-1 positive integers. 10
 2, 1, 4, 1, 2, 3, 7, 1, 2, 3, 4, 5, 10, 1, 2, 3, 4, 5, 6, 7, 13, 1, 2, 3, 4, 5, 6, 7, 8, 9, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 22, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 25, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 28, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The same as A171172 except the initial term. Also, a(n) is the length of each component of the n-th L-toothpick added to the structure of A171165. See also A171175, a permutation of the natural numbers. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..10000 N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS Index entries for sequences related to toothpick sequences EXAMPLE Triangle begins: 2,1, 4,1,2,3, 7,1,2,3,4,5, 10,1,2,3,4,5,6,7, 13,1,2,3,4,5,6,7,8,9, 16,1,2,3,4,5,6,7,8,9,10,11, 19,1,2,3,4,5,6,7,8,9,10,11,12,13, 22,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 25,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17, MATHEMATICA Join[{2, 1}, Flatten[Table[Flatten[{3n+1, Range[2n+1]}], {n, 10}]]] (* Harvey P. Dale, Nov 24 2011 *) CROSSREFS Cf. A000027, A033627, A172310, A171164, A161165, A161166, A171172, A171174, A171175, A171176, A171177, A171178. Sequence in context: A083414 A334890 A171174 * A268671 A163618 A341691 Adjacent sequences: A171170 A171171 A171172 * A171174 A171175 A171176 KEYWORD easy,nonn,tabf AUTHOR Omar E. Pol, Feb 23 2010 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 16 02:19 EDT 2024. Contains 373416 sequences. (Running on oeis4.)