|
例子
|
方桌开始:
1, 1, 1, 0, -6, -33, -143, -572, -2210, -8398, ...
1, 2, 4, 6, -4, -100, -664, -3514, -16916, -77388, ...
1, 3, 9, 24, 42, -87, -1575, -12240, -77730, -449994, ...
1, 4, 16, 60, 192, 360, -1568, -26804, -240800, -1804456, ...
1, 5, 25, 120, 530, 1955, 3785, -28900, -508610, -5227110, ...
1, 6, 36, 210, 1164, 5892, 24552, 48258, -577380, -10814388, ...
1, 7, 49, 336, 2226, 13965, 79681, 370216, 733054, -12716578, ...
1, 8, 64, 504, 3872, 28688, 200960, 1276760, 6548320, 13015536, ...
1, 9, 81, 720, 6282, 53415, 437697, 3387636, 23729310, 133234434, ...
1, 10, 100, 990, 9660, 92460, 862120, 7743550, 65644780, 502780580,...
F(x)=x+x^2+x^3-6x^5-33x^6-143x^7-572x^8-2210x^9+。。。
F(F(x))=x+2 x ^2+4 x ^3+6 x ^4-4 x ^5-100 x ^6-664x ^7+。。。
(F(F(x)))=x+3x^2+9x^3+24x^4+42x^5-87x^6-1575x^7+。。。
(F(F(x)))=x+4x^2+16x^3+60x^4+192x^5+360x^6+。。。
F(F(F,F(x)))=x+5x^2+25x^3+120x^4+530x^5+1955x^6+。。。
F(F(F))=x+6x^2+36x^3+210x^4+1164x^5+5892x^6+。。。
|