OFFSET
0,3
COMMENTS
The limiting ratio a(n+1)/a(n) is:2.1588924674387395
FORMULA
a(n) = 2*a(n - 1) + a(n - 2) - Floor[a(n - 2)/2] - Floor[a) n - 4]/2] - Floor[a(n - 5)/2].
MATHEMATICA
a[-3] = 0; a[-2] = 0; a[-1] = 0; a[0] = 1; a[1] = 1;
a[n_] := a[n] =
2*a[n - 1] + a[n - 2] - Floor[a[n - 2]/2] - Floor[a[n - 4]/2] -
Floor[a[n - 5]/2]
Table[a[n], {n, 0, 30}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Nov 23 2010
STATUS
approved