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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 8193 |
| 3 | 1602516 |
| 4 | 68711380 |
| 5 | 1289414505 |
| 6 | 14350108521 |
| 7 | 111239118928 |
| 8 | 660994932816 |
| 9 | 3202860761145 |
| 10 | 13202860761145 |
| 11 | 47725572905076 |
| 12 | 154718778284148 |
| 13 | 457593884876401 |
| 14 | 1251308658130545 |
| 15 | 3197503726489920 |
[0,1,8193,1602516,68711380,1289414505,14350108521, 111239118928,660994932816,3202860761145, 13202860761145,47725572905076,154718778284148, 457593884876401,1251308658130545,3197503726489920] |