0,4

The a(n+1)/a(n) ratio is chaotic as is the later part of the sequence.

Table of n, a(n) for n=0..50.

a(n)=a(n-2)+a(n-3)-Floor[a(n-4)/2]-Floor[a(n-6)/2]

f[-4] = 0; f[-3] = 0; f[-2] = 0; f[-1] = 0; f[0] = 1; f[1] = 1;

f[n_] := f[n] = f[n - 2] + f[n - 3] - Floor[f[n - 4]/2] - Floor[f[n - 6]/2]

Table[f[n], {n, 0, 50}]

Sequence in context: A126246 A173633 A138369 * A138374 A029936 A114093

Adjacent sequences: A173329 A173330 A173331 * A173333 A173334 A173335

nonn

Roger L. Bagula, Nov 22 2010

approved