# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a169688 Showing 1-1 of 1 %I A169688 #6 Feb 24 2021 02:48:19 %S A169688 0,4,24,16,96,16,80,48,336,16,80,48,304,48,240,144,1104,16,80,48,304, %T A169688 48,240,144,1040,48,240,144,912,144,720,432,3504,16,80,48,304,48,240, %U A169688 144,1040,48,240,144,912,144,720,432,3376,48,240,144,912,144,720,432,3120,144,720 %N A169688 A169648(4n+4) - A147582(4n+5). %C A169688 A169648 and A147582 agree except at these terms. %H A169688 David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.] %H A169688 N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS %F A169688 For recurrence see A169689. %Y A169688 Cf. A147582, A169648, A169689. %K A169688 nonn %O A169688 -1,2 %A A169688 _N. J. A. Sloane_, Apr 14 2010 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE