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 A160727 a(n) = A161415(n+1)/4. 4
 2, 3, 7, 3, 9, 9, 23, 3, 9, 9, 27, 9, 27, 27, 73, 3, 9, 9, 27, 9, 27, 27, 81, 9, 27, 27, 81, 27, 81, 81, 227, 3, 9, 9, 27, 9, 27, 27, 81, 9, 27, 27, 81, 27, 81, 81, 243, 9, 27, 27, 81, 27, 81, 81, 243, 27, 81, 81, 243, 81, 243, 243, 697, 3, 9, 9, 27, 9 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS FORMULA a(n) = A048883(n), except a(n) = A048883(n) - (n+1)/2 if n is a power of 2 minus 1. - Omar E. Pol, Jan 06 2014 EXAMPLE From Omar E. Pol, Jan 01 2014: (Start) Written as an irregular triangle in which row lengths is A000079 the sequence begins: 2; 3,7; 3,9,9,23; 3,9,9,27,9,27,27,73; 3,9,9,27,9,27,27,81,9,27,27,81,27,81,81,227; 3,9,9,27,9,27,27,81,9,27,27,81,27,81,81,243,9,27,27,81,27, 81,81,243,27,81,81,243,81,243,243,697; (End) CROSSREFS Cf. A152978, A153000, A160414, A161415. Sequence in context: A110057 A226985 A174407 * A187152 A086508 A085641 Adjacent sequences:  A160724 A160725 A160726 * A160728 A160729 A160730 KEYWORD nonn,tabf AUTHOR Omar E. Pol, Jun 13 2009 EXTENSIONS a(11)-a(58) from M. F. Hasler, Dec 03 2012 a(59)-a(68) from Omar E. Pol, Jan 06 2014 STATUS approved

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Last modified August 3 07:58 EDT 2021. Contains 346435 sequences. (Running on oeis4.)