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 A015027 q-factorial numbers for q=-12. 1
 1, -11, -1463, 2333485, 44665236385, -10259202810507035, -28277368892180867021255, 935288538953861649874525071325, 371221802129246962654056875248358359825, -1768082733073463162105209099485375242162416580075 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..40 FORMULA Prod_{k=1}^{n} (q^k - 1) / (q - 1). a(1) = 1, a(n) = ((-12)^n -1)*a(n-1)/(-13). - Vincenzo Librandi, Oct 26 2012 MATHEMATICA RecurrenceTable[{a[1]==1, a[n]==(((-12)^n - 1) * a[n-1])/(-13)}, a, {n, 15}] (* Vincenzo Librandi, Oct 26 2012 *) PROG (MAGMA) [n le 1 select 1 else ((-12)^n - 1)*Self(n-1)/(-13): n in [1..13]]; // Vincenzo Librandi, Oct 26 2012 CROSSREFS Sequence in context: A110195 A015484 A145185 * A160264 A076168 A053884 Adjacent sequences:  A015024 A015025 A015026 * A015028 A015029 A015030 KEYWORD sign,easy AUTHOR STATUS approved

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