OFFSET
0,7
LINKS
Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, -1).
FORMULA
a(n) = ceiling(A003269(n)/2).
a(n)= a(n-1) + a(n-4) + a(n-15) - a(n-16) - a(n-19). - R. J. Mathar, Sep 10 2016
MATHEMATICA
b[0] = 0; b[1] = 1; b[2] = 1; b[3] = 1;
b[n_] := b[n] = b[n - 1] + b[n - 4]
Table[b[n] - Floor[b[n]/2], {n, 0, 30}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Nov 25 2010
STATUS
approved