G.f.:A(x)=1+x+2*x^2!+8*x^3/3!+56*x^4/4!+592*x^5/5!+8512*x^6/6!+。。。
例如f.的对数导数等于加泰罗尼亚数字:
对数(A(x))=x+x^2/2+2*x^3/3+5*x^4/4+14*x^5/5+42*x^6/6+132*x^7/7+429*x^8/8++A000108号(n-1)*x^n/n+。。。
因此A'(x)/A(x)=C(x),其中C(x。
此外,例如f.A(x)满足:
A(x)=1+x/A(x)+4*(x/A(x))^2/2!+32*(x/A(x))^3/3!+400*(x/A(x))^4/4!+6912*(x/A(x))^5/5!+…+(n+1)^(n-2)*2^n*(x/A(x))^n/n!+。。。
如果我们形成一个系数表x^k/k!在A(x)^n中,如下所示:
[1, 1, 2, 8, 56, 592, 8512, 155584, 3456896, ...];
[1, 2, 6, 28, 200, 2064, 28768, 511424, 11106432, ...];
[1, 3, 12, 66, 504, 5256, 72288, 1259712, 26822016, ...];
[1, 4, 20, 128, 1064, 11488, 158752, 2740480, 57517184, ...];
[1, 5, 30, 220, 2000, 22680, 319600, 5525600, 115094400, ...];
[1, 6, 42, 348, 3456, 41472, 602352, 10533024, 219321216, ...];
[1, 7, 56, 518, 5600, 71344, 1075648, 19176304, 401916032, ...];
[1, 8, 72, 736, 8624, 116736, 1835008, 33554432, 712166016, ...];
[1, 9, 90, 1008, 12744, 183168, 3009312, 56687040, 1224440064, ...]; ...
则主对角线等于(n+1)^(n-1)*2^n,对于n>=0:
[1, 2, 12, 128, 2000, 41472, 1075648, 33554432, 1224440064, ...].
注意,和{n>=0}(n+1)^(n-2)*2^n*x^n/n!是的e.g.fA127670型.