重复次数:3*(n-1)*n^2*(2*n+1)*(15680*n^7-198268*n^6+1049184*n^5-3003295*n^4+5004388*n^3-4830736*n^2+2483598*n-518661)*a(n)=(n-1编号4+141797620*n^3+8081106*n^2-23913486*n+4762800)*a(n-1)+2*(909440*n^11-14525784*n^10+100260068*n^9-390684898*n^8+940603537*n^7-1433395699*n^6+1346188538*n*^5-691297162*n^4+97138838*n|3+77570673*n^2-37619991*n+4762800)*a(n-2)-2*(1662080*n^11-24324888*n^10+154076996*n^9-552269110*n^8+1226963821*n^7-1732162636*n^6+1512829217*n^5-721942210*n^4+86052929*n^3+81957789*n^2-37651608*n+4762800)*a(n-3)-(2*n-3)*(862400*n^10-12613860*n^9+77917844*n^8-263521873*n^7+527376397*n^6-624837256*n^5+401742338*n^4-90648379*n^3-35886325*n^2+22963194*n-3175200)*a(n-4)+3*(n-3)*(2*n-5)*(3*n-8)*(3+7)*(15680*n^7-88508*n^6+188856)*n^5-182595*n^4+66488*n^3+9758*n^2-11818*n+1890)*a(n-5)。
a(n)~3^(3*n+13/2)/(832*Pi*n)。
(结束)