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 A169708 First differences of A169707. 9
 1, 4, 4, 12, 4, 12, 20, 28, 4, 12, 20, 28, 20, 44, 68, 60, 4, 12, 20, 28, 20, 44, 68, 60, 20, 44, 68, 76, 84, 156, 196, 124, 4, 12, 20, 28, 20, 44, 68, 60, 20, 44, 68, 76, 84, 156, 196, 124, 20, 44, 68, 76, 84, 156, 196, 140, 84, 156, 212, 236, 324, 508, 516, 252, 4, 12, 20, 28, 20 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS David Applegate, The movie version N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS FORMULA It appears that a(n) = 4*A160552(n), n >= 1. - Omar E. Pol, Feb 13 2015 EXAMPLE From Omar E. Pol, Feb 13 2015: (Start) Written as an irregular triangle in which row lengths are 1,1,2,4,8,16,32,... the sequence begins: 1; 4; 4,12; 4,12,20,28; 4,12,20,28,20,44,68,60; 4,12,20,28,20,44,68,60,20,44,68,76,84,156,196,124; 4,12,20,28,20,44,68,60,20,44,68,76,84,156,196,124,20,44,68,76,84,156,196,140,84,156,212,236,324,508,516,252; It appears that the row sums give A000302. It appears that the right border gives A173033. (End) CROSSREFS Cf. A000302, A011782, A139251, A151548, A152980, A153006, A160164, A160552, A169707 (partial sums), A170903, A173033, A253088. Sequence in context: A147582 A162793 A269568 * A256261 A256251 A256139 Adjacent sequences:  A169705 A169706 A169707 * A169709 A169710 A169711 KEYWORD nonn,tabf AUTHOR N. J. A. Sloane, Apr 17 2010 EXTENSIONS Initial 1 added by Omar E. Pol, Feb 13 2015 STATUS approved

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Last modified November 13 13:15 EST 2018. Contains 317149 sequences. (Running on oeis4.)