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Search: id:A014993
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A014993 q-integers for q=-11. +0
1
1, -10, 111, -1220, 13421, -147630, 1623931, -17863240, 196495641, -2161452050, 23775972551, -261535698060, 2876892678661, -31645819465270, 348104014117971, -3829144155297680, 42120585708274481 (list; graph; listen)
OFFSET

1,2

FORMULA

a(n) = a(n-1) + q^{(n-1)} = {(q^n - 1) / (q - 1)}

CROSSREFS

Sequence in context: A103581 A087545 A078252 this_sequence A015592 A122574 A084031

Adjacent sequences: A014990 A014991 A014992 this_sequence A014994 A014995 A014996

KEYWORD

sign,easy

AUTHOR

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

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.


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