■日本の畳(その8)
【1】合同でない畳敷きの母関数
Im(z)=ΣU(m,n)z^n=
[1]m=0のとき,1
[2]m=1のとき,1/(1−z^2)
[3]m=2のとき,(1−z^2−z^6−z^7−z^9−z^11)/(1−z−z^3)(1−z^2−z^6)
[4]mは奇数で,3≦m≦nのとき,
1/4・{2(1+z^m-1+z^m+1+z^2m-2+z^2m+2)/(1−z^2m-2−z^2m+2)+Tm(z)}
[5]mは偶数で,4≦m≦nのとき,
1/2・{(z+z^m+z^m+2)(1+z^2m-4+z^2m)/(1−z^2m-2−z^2m+2)+Tm(z)−z^m}
m\n 1 2 3 4 5 6 7 8
1 0 1 0 1 0 1 0 1
2 1 1 2 3 4 6 8 12
3 0 2 0 2 0 2 0 4
4 1 3 2 1 2 2 2 3
5 0 4 0 2 0 1 0 1
6 1 6 2 2 1 1 1 1
7 0 8 0 2 0 1 0 1
8 1 12 4 3 1 1 1 1
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