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A061127 Number of degree-n permutations of order exactly 24. 0

%I #14 May 10 2013 12:44:45

%S 0,0,0,0,0,0,0,0,0,0,1663200,19958400,259459200,4843238400,

%T 72648576000,988020633600,14600749363200,224704121241600,

%U 3614691131251200,84808750650624000,1509309706083379200,29359195162807910400

%N Number of degree-n permutations of order exactly 24.

%F E.g.f.: exp(x + 1/2*x^2 + 1/4*x^4) - exp(x + 1/2*x^2 + 1/4*x^4 + 1/8*x^8) - exp(x + 1/2*x^2 + 1/3*x^3 + 1/4*x^4 + 1/6*x^6 + 1/12*x^12) + exp(x + 1/2*x^2 + 1/3*x^3 + 1/4*x^4 + 1/6*x^6 + 1/8*x^8 + 1/12*x^12 + 1/24*x^24).

%t nn=22;Range[0,nn]!CoefficientList[Series[(Exp[x^24/24]-1)Exp[x+x^2/2+x^3/3+x^4/4+x^6/6+x^8/8+x^12/12]+(Exp[x^12/12]-1)(Exp[x^8/8]-1)Exp[x+x^2/2+x^3/3+x^4/4+x^6/6]+(Exp[x^8/8]-1)(Exp[x^6/6]-1)Exp[x+x^2/2+x^3/3+x^4/4]+(Exp[x^8/8]-1)(Exp[x^3/3]-1)Exp[x+x^2/2+x^4/4],{x,0,nn}],x]//Rest (* _Geoffrey Critzer_, Feb 04 2013 *)

%Y Cf. A000085, A001470, A001472, A052501, A053496 - A053505, A001189, A001471, A001473, A061121 - A061128.

%K easy,nonn

%O 1,11

%A _Vladeta Jovovic_, Apr 14 2001

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