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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 16 |
| 5 | 39 |
| 6 | 94 |
| 7 | 321 |
| 8 | 415 |
| 9 | 736 |
| 10 | 31327 |
| 11 | 32063 |
| 12 | 63390 |
| 13 | 222233 |
| 14 | 507856 |
| 15 | 1237945 |
| 16 | 2983746 |
| 17 | 10189183 |
| 18 | 13172929 |
| 19 | 23362112 |
| 20 | 994381633 |
| 21 | 1017743745 |
| 22 | 2012125378 |
| 23 | 7054119879 |
| 24 | 16120365136 |
| 25 | 39294850151 |
| 26 | 94710065438 |
| 27 | 323425046465 |
| 28 | 418135111903 |
| 29 | 741560158368 |
[1,1,2,7,16,39,94,321,415,736,31327,32063,63390, 222233,507856,1237945,2983746,10189183,13172929, 23362112,994381633,1017743745,2012125378, 7054119879,16120365136,39294850151,94710065438, 323425046465,418135111903,741560158368] |