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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 19 |
| 5 | 45 |
| 6 | 173 |
| 7 | 469 |
| 8 | 1915 |
| 9 | 5659 |
| 10 | 23407 |
| 11 | 73243 |
| 12 | 310175 |
| 13 | 1013731 |
| 14 | 4337131 |
| 15 | 14639923 |
| 16 | 63383137 |
| 17 | 219607045 |
| 18 | 958081677 |
| 19 | 3390264805 |
| 20 | 14897264533 |
| 21 | 53646021617 |
| 22 | 237065064241 |
| 23 | 866461879503 |
| 24 | 3847927301399 |
| 25 | 14243170102087 |
| 26 | 63522243469947 |
| 27 | 237734050804415 |
| 28 | 1064177906517043 |
| 29 | 4021244623026059 |
[1,1,3,5,19,45,173,469,1915,5659,23407,73243, 310175,1013731,4337131,14639923,63383137, 219607045,958081677,3390264805,14897264533, 53646021617,237065064241,866461879503, 3847927301399,14243170102087,63522243469947, 237734050804415,1064177906517043,4021244623026059] |