L.g.f.:L(x)=2*x+6*x^2/2+92*x^3/3+5410*x^4/4+1400652*x^5/5+。。。
exp(L(x))=1+2*x+5*x^2+38*x^3+1425*x^4+283002*x^5+448468978*x^6+。。。
初始术语说明:
a(1)=1^0+1^2=2;
a(2)=1^0+2^2+1^4=6;
a(3)=1^0+3^2+3^4+1^6=92;
a(4)=1^0+4^2+6^4+4^6+1^8=5410;
a(5)=1^0+5^2+10^4+10^6+5^8+1^10=1400652。。。