OFFSET
0,7
REFERENCES
R. Bacher and R. Chapman, Symmetric Pascal matrices modulo p, European J. Combin. 25 (2004), no. 4, 459-473.
FORMULA
a(2n) = n - a(n). - Ralf Stephan, Oct 07 2003
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Roland Bacher, Jun 18 2003
STATUS
approved