Hosoya and Harary Polynomials of Hourglass and Rhombic Benzenoid Systems

Table 1

Number of pair of vertices at different distances.

	n
	2	3	4	5	6	7
1	19	38	63	94	131	174
2	28	62	108	166	236	318
3	30	75	138	219	318	435
4	24	76	152	252	376	524
5	14	69	154	269	414	589
6	4	54	144	270	432	630
7	1	34	125	258	433	650
8		14	98	234	418	650
9		8	65	200	389	632
10		4	32	158	348	598
11		1	22	109	296	549
12			14	60	236	488
13			8	45	168	415
14			4	32	100	334
15			1	22	79	244
16				14	60	154
17				8	45	126
18				4	32	100
19				1	22	79
20					14	60
21					8	45
22					4	32
23					1	22
24						14
25						8
26						4
27						1