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) - [a(n-2)/2] - [a(n-4)/2] - [a(n-5)/2], where [] denotes the floor function.
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,changed
AUTHOR
Roger L. Bagula, Nov 23 2010
STATUS
approved