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A289846 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 9 |
| 4 | 18 |
| 5 | 39 |
| 6 | 80 |
| 7 | 170 |
| 8 | 353 |
| 9 | 744 |
| 10 | 1553 |
| 11 | 3262 |
| 12 | 6824 |
| 13 | 14313 |
| 14 | 29970 |
| 15 | 62823 |
| 16 | 131596 |
| 17 | 275782 |
| 18 | 577777 |
| 19 | 1210704 |
| 20 | 2536657 |
| 21 | 5315210 |
| 22 | 11136700 |
| 23 | 23334969 |
| 24 | 48893202 |
| 25 | 102446199 |
| 26 | 214654136 |
| 27 | 449764562 |
| 28 | 942387569 |
| 29 | 1974580920 |
| 30 | 4137324929 |
| 31 | 8668915558 |
| 32 | 18163921856 |
[1,2,4,9,18,39,80,170,353,744,1553,3262,6824, 14313,29970,62823,131596,275782,577777,1210704, 2536657,5315210,11136700,23334969,48893202, 102446199,214654136,449764562,942387569, 1974580920,4137324929,8668915558,18163921856] |