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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 16 |
| 7 | 162 |
| 8 | 1345 |
| 9 | 10096 |
| 10 | 72973 |
| 11 | 531015 |
| 12 | 3984762 |
| 13 | 30987321 |
| 14 | 248303940 |
| 15 | 2036778980 |
| 16 | 17044330217 |
| 17 | 145588640408 |
| 18 | 1272940217747 |
| 19 | 11434350878640 |
| 20 | 105849240653792 |
| 21 | 1011701166471075 |
| 22 | 9987958951272492 |
| 23 | 101765834737586068 |
| 24 | 1068365602976497915 |
| 25 | 11534318293877771406 |
[1,16,162,1345,10096,72973,531015,3984762, 30987321,248303940,2036778980,17044330217, 145588640408,1272940217747,11434350878640, 105849240653792,1011701166471075,9987958951272492, 101765834737586068,1068365602976497915, 11534318293877771406] |