OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..50
MATHEMATICA
Total/@Table[QBinomial[n, m, -20], {n, 0, 20}, {m, 0, n}] (* Harvey P. Dale, Aug 27 2012 *)
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
More terms from Harvey P. Dale, Aug 27 2012
STATUS
approved