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 A028894 a(n) = either 4a(n-1)+1 or 4a(n-1)+3 depending on corresponding term of A005614, +1 for 0, +3 for 1. 2
 1, 5, 23, 95, 381, 1527, 6109, 24439, 97759, 391037, 1564151, 6256607, 25026429, 100105719, 400422877, 1601691511, 6406766047, 25627064189, 102508256759, 410033027037, 1640132108151, 6560528432607, 26242113730429 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..23. MATHEMATICA f[1]={0}; f[2]={1}; f[n_] := f[n]=Join[f[n-1], f[n-2]]; a[1]=1; a[n_] := a[n]=4a[n-1]+1+2f[9][[n]]; a/@Range[1, 30] CROSSREFS Related to A005614, A002450, A037576, A066744. Sequence in context: A327973 A255457 A146013 * A254824 A140529 A055489 Adjacent sequences: A028891 A028892 A028893 * A028895 A028896 A028897 KEYWORD nonn AUTHOR John McNamara, Jan 12 2002 EXTENSIONS Edited by Dean Hickerson, Jan 14, 2002 STATUS approved

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Last modified December 9 19:52 EST 2023. Contains 367693 sequences. (Running on oeis4.)