The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 Vincenzo Librandi, Table of n, a(n) for n = 1..40 Index entries for sequences related to factorial numbers 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 Adjacent sequences: A015025 A015026 A015027 * A015029 A015030 A015031 KEYWORD sign,easy AUTHOR Olivier Gérard STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

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