Research Article
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 |
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