经验:a(n)=(53/12563542634365594763264000000)*n^31
+(887251/5305571962438211726169600000)*n^30
+(168683833/5305571962438211726169600000)*n^29
+(41695943/107607651039428421353472000000)*n^28
+(2966611997/87110955603346817286144000000)*n^27
+(2731091581/1161479408044624230481920000)*n^26
+(934969479473/6700842738718985945088000000)*n^25
+(71784126942161/9381179834206580323123200000)*n^24
+(3676674924849281/9381179834206580323123200000)*n^23
+(563822102281853/31375183391995251916800000)*n^22
+(83036861466787/11771353076361854976000)*n^21
+(449635445808107101/19422732575997060710400000)*n^20
+(477728343774895560181/75748657046388536770560000)*n^19
+(3984914175553439894747/27907399964458934599680000)*n^18
+(75296304543122414243729/27907399964458934599680000)*n^17
+(70202812023470878658099/16416117626152314470000)*n^16
+(22342133059122888182221/3908599434798117011200000)*n^15
+(538093024334021462801389/83057737989461148800000)*n^14
+(2442381065653362888003371/390188824071369523200000)*n^13
+(58251363958080569432189063/112466190467630039040000)*n^12
+(3197480702491150929211393747/8690569263407775744000000)*n^11
+(8235918337333023060582879371/3676779303749443584000000)*n^10
+(303695701411023425123140222861/2617516694812103884800000)*n^9
+(146703475487334161319713918707/290835188312455987200000)*n^8
+(1138074246303729762260088761137/6301429080103213056000000)*n^7
+(382639794160479617211461259329/735166172601204152320000)*n^6
+(6678667213399686650750546663/5672582762438592000000)*n^5
+(6218970366747150808423568309/3063194691716839680000)*n^4
+(766642858773590076444321617/3021518573462188000)*n^3
+(57745583617616433273949/27977023828353600)*n^2
+(32024932439911153349/361008882223400)*n
+35316个
|