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 A124437 Experience Points thresholds for levels in the P&P-RPG "Das Schwarze Auge" (DSA, aka "The Dark Eye"). 0
 0, 100, 300, 600, 1000, 1500, 2100, 2800, 3600, 4500, 5500, 6600, 7800, 9100, 10500, 12000, 13600, 15300, 17100, 19000, 21000, 23100, 25300, 27600, 30000, 32500, 35100, 37800, 40600, 43500, 46500, 49600, 52800, 56100, 59500, 63000, 66600 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 REFERENCES "Das Schwarze Auge - Basisregelwerk" (basic rule book), Fantasy Productions Verlags- und Medienvertriebsgesellschaft mbH, Erkrath, Germany, 2005, ISBN 3890644406 LINKS Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n) = a(n-1)+(n-1)*100; a(1) = 0. From Chai Wah Wu, Jul 11 2016: (Start) a(n) = 50*n*(n-1). a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n > 3. G.f.: 100*x^2/(1 - x)^3. (End) EXAMPLE a(7)=2100 because a(6)+(7-1)*100 = (a(5)+500)+600 =(((((0+100)+200)+300)+400)+500)+600. MATHEMATICA Table[50 n (n - 1), {n, 37}] (* or *) CoefficientList[Series[100 x^2/(1 - x)^3, {x, 0, 37}], x] (* Michael De Vlieger, Jul 11 2016 *) LinearRecurrence[{3, -3, 1}, {0, 100, 300}, 40] (* Harvey P. Dale, Jun 26 2017 *) PROG (C) int folge(n){ if (n==1) return 0; return (folge(n-1)+(n-1)*100); } (PARI) a(n)=50*n*(n-1) \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Sequence in context: A261276 A104908 A109633 * A138668 A017174 A202334 Adjacent sequences:  A124434 A124435 A124436 * A124438 A124439 A124440 KEYWORD easy,nonn AUTHOR Christoph D. Schmidt (snu(AT)power.ms), Dec 16 2006, Dec 21 2006 STATUS approved

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Last modified October 16 23:30 EDT 2019. Contains 328103 sequences. (Running on oeis4.)