OFFSET
0,2
COMMENTS
REFERENCES
Tony Colledge, "Pascal's Triangle, A teacher's guide with blackline masters," Tarquin Publications, Norfolk, England, Second Edition, 1997, page 9.
MATHEMATICA
a[ n_ ] := n + 1 - 2*Sum[ Mod[ Binomial[ n, k ], 2 ], {k, 0, n} ];
Table[ Sum[ a[ k ], {k, 0, n} ], {n, 0, 100} ]
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Robert G. Wilson v, Sep 29 2001
EXTENSIONS
New name from Sean A. Irvine, Jul 05 2023
STATUS
approved