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A015025 q-factorial numbers for q=-10. 0
1, -9, -819, 744471, 6767985861, -615270826637649, -559337171058846967059, 5084883322413411422459366631, 462262120681663158624798004859942421, -420238291486760860506028808179511473194550689 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

prod_{k=1}^{k=n} {(q^k - 1) / (q - 1)}

CROSSREFS

Sequence in context: A137065 A196981 A197166 * A027878 A045793 A069054

Adjacent sequences:  A015022 A015023 A015024 * A015026 A015027 A015028

KEYWORD

sign,easy

AUTHOR

Olivier Gerard (olivier.gerard(AT)gmail.com)

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Last modified February 16 05:51 EST 2012. Contains 205860 sequences.