例如:D(x,k)=1+k^2*x^2/2!+(8*k^2+1*k^4)*x^4/4!+(136*k^2+88*k^4+1*k^6)*x^6/6!+(3968*k^2+6240*k^4+816*k^6+1*k^8)*x^8/8!+(176896*k^2+513536*k^4+195216*k*6+7376*k^8+1*k^10)*x^10/10!+(11184128*k^2+51880064*k^4+39572864*k*6+5352544*k^8+66424*k^10+1*k^12)*x^12/12!+(951878656*k^2+645343344*k^4+8258202240*k^6+2458228480*k^8+139127640*k^10+597864*k^12+1*k^14)*x^14/14!+。。。
使得D(x,k)=dn(i*积分C(x,k)dx,k。
x^(2*n)*k^(2*j)/(2*n)的系数T(n,j)的三角形!例如,f.D(x,k)开始于:
1;
0, 1;
0, 8, 1;
0, 136, 88, 1;
0, 3968, 6240, 816, 1;
0, 176896, 513536, 195216, 7376, 1;
0, 11184128, 51880064, 39572864, 5352544, 66424, 1;
0, 951878656, 6453433344, 8258202240, 2458228480, 139127640, 597864, 1;
0, 104932671488, 978593947648, 1889844670464, 994697838080, 137220256000, 3535586112, 5380832, 1;
0, 14544442556416, 178568645312512, 485265505927168, 398800479698944, 102950036177920, 7233820923904, 88992306208, 48427552, 1; ...
相关系列。
相关序列S(x,k),其中D(x,k)^2-k^2*S(x、k)^2=1开始
S(x,k)=x+(2+1*k^2)*x^3/3!+(16+28*k^2+1*k^4)*x^5/5!+(272+1032*k^2+270*k^4+1*k^6)*x^7/7!+(7936+52736*k^2+36096*k^4+2456*k^6+1*k^8)*x^9/9!+(353792+3646208*k^2+4766048*k^4+1035088*k^6+22138*k^8+1*k^10)*x^11/11!+(22368256+330545664*k^2+704357760*k^4+319830400*k^6+27426960*k^8+199284*k*10+1*k^12)*x^13/13!+(1903757312+38188155904*k^2+120536980224*k^4+93989648000*k^6+18598875760*k^8+702812568*k^10+1793606*k^12+1*k^14)*x^15/15!+。。。
相关系列C(x,k),其中C(x,k)^2-S(x,k)^2=1,开始
C(x,k)=1+x^2/2!+(5+4*k^2)*x^4/4!+(61+148*k^2+16*k^4)*x^6/6!+(1385+6744*k^2+2832*k^4+64*k^6)*x^8/8!+(50521+410456*k^2+383856*k^4+47936*k^6+256*k|8)*x^10/10!+(2702765+32947964*k^2+54480944*k^4+17142784*k*6+780544*k^8+1024*k^10)*x^12/12!+(199360981+3402510924*k^2+8760740640*k^4+5199585280*k^6+68671140*k^8+1255264*k^10+4096*k^12)*x^14/14!+。。。
它也满足C(x,k)=cn(i*积分C(x、k)dx,k。