A066744 a(n) = either 4a(n-1)+1 or 4a(n-1)+3 depending on corresponding term of A005614, +3 for 0, +1 for 1.

1, 7, 29, 117, 471, 1885, 7543, 30173, 120693, 482775, 1931101, 7724405, 30897623, 123590493, 494361975, 1977447901, 7909791605, 31639166423, 126556665693, 506226662775, 2024906651101, 8099626604405, 32398506417623

Offset

1,2

Comments

Ratio to terms of A028894 tends to 1.23459972586...

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]+3-2f[9][[n]]; a/@Range[1, 30]

Crossrefs

Related to A005614, A002450, A037576, A028894.

Sequence in context: A037094 A118171 A072261 * A037576 A327587 A055427

Adjacent sequences: A066741 A066742 A066743 * A066745 A066746 A066747

Keyword

nonn

Author

John McNamara, Jan 16 2002

Status

approved