| 数据
|
1, 1, 3, 10, 37, 140, 544, 2181, 8873, 36647, 152950, 644313, 2734648, 11681428, 50173541, 216532005, 938383331, 4081653710, 17811999929, 77957939080, 342099306436, 1504801777973, 6633574235109, 29300516237855
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| 示例
|
通用公式:A(x)=1+x+3*x^2+10*x^3+37*x^4+140*x^5+544*x^6+。。。
等于级数之和:
A(x)=1+(1+x)^2*x+(1+4*x+x^2)^2*x^2
+(1+9*x+9*x2+x^3)^2*x^3
+(1+16*x+36*x^2+16*x^3+x^4)^2*x^4
+(1+25*x+100*x^2+100*x^3+25*x^4+x^5)^2*x^5
+(1+36*x+225*x^2+400*x^3+225*x^4+36*x^5+x^6)^2*x^6+。。。
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