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A015028 q-factorial numbers for q=-13. 1
1, -12, -1884, 3843360, 101929750560, -35142523960072320, -157510092662430660915840, 9177558663913662855639573043200, 6951672507594336724476921764731548211200 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
Prod_{k=1}^{n} (q^k - 1) / (q - 1).
a(1) = 1, a(n) = ((-13)^n - 1)*a(n-1)/(-14). - Vincenzo Librandi, Oct 26 2012
MATHEMATICA
RecurrenceTable[{a[1]==1, a[n]==(((-13)^n - 1) a[n-1])/(-14)}, a, {n, 15}] (* Vincenzo Librandi, Oct 26 2012 *)
PROG
(Magma) [n le 1 select 1 else ((-13)^n - 1)*Self(n-1)/(-14): n in [1..13]]; // Vincenzo Librandi, Oct 26 2012
CROSSREFS
Sequence in context: A229752 A104009 A261946 * A167745 A326601 A265216
KEYWORD
sign,easy
AUTHOR
STATUS
approved

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Last modified March 4 08:51 EST 2024. Contains 370528 sequences. (Running on oeis4.)