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 A084847 2*3^n+2^(2n-1)*(n-2). 0
 1, 4, 18, 86, 418, 2022, 9650, 45334, 209730, 956870, 4312402, 19228662, 84948962, 372287398, 1620178674, 7008019670, 30150864514, 129107299206, 550530654866, 2338786731958, 9902578218786, 41802362561894, 175984622563378 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Binomial transform of A084643. Third binomial transform of abs(A060747). LINKS Index entries for linear recurrences with constant coefficients, signature (11,-40,48). FORMULA G.f.: (1-7x+14x^2)/((1-3x)(1-4x)^2). CROSSREFS Sequence in context: A030278 A318217 A151252 * A082685 A111966 A225887 Adjacent sequences:  A084844 A084845 A084846 * A084848 A084849 A084850 KEYWORD easy,nonn AUTHOR Paul Barry, Jun 09 2003 STATUS approved

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Last modified December 14 11:52 EST 2018. Contains 318097 sequences. (Running on oeis4.)