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A117647 a(2n) = A014445(n), a(2n+1) = A015448(n+1). 2

%I

%S 0,1,2,5,8,21,34,89,144,377,610,1597,2584,6765,10946,28657,46368,

%T 121393,196418,514229,832040,2178309,3524578,9227465,14930352,

%U 39088169,63245986,165580141,267914296,701408733

%N a(2n) = A014445(n), a(2n+1) = A015448(n+1).

%C a(n+1) = A059973(n+1) - A059973(n).

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,4,0,1).

%F G.f. -x*(x+1)^2/(x^4+4*x^2-1)

%Y Cf. A000045, A033887, A014445, A015448, A059973.

%K easy,nonn

%O 0,3

%A _Creighton Dement_, Apr 10 2006

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Last modified June 18 11:58 EDT 2021. Contains 345098 sequences. (Running on oeis4.)