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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 22 |
| 5 | 74 |
| 6 | 233 |
| 7 | 742 |
| 8 | 2600 |
| 9 | 8757 |
| 10 | 29483 |
| 11 | 105376 |
| 12 | 367158 |
| 13 | 1274598 |
| 14 | 4608221 |
| 15 | 16375729 |
| 16 | 57962319 |
| 17 | 211204408 |
| 18 | 760061396 |
| 19 | 2725968135 |
| 20 | 9991147348 |
| 21 | 36270853154 |
| 22 | 131314876548 |
| 23 | 483493516444 |
| 24 | 1766591345713 |
| 25 | 6440568928849 |
| 26 | 23800489289355 |
| 27 | 87397562097188 |
| 28 | 320347178631384 |
| 29 | 1187331037023229 |
| 30 | 4377412784930187 |
[1,1,3,8,22,74,233,742,2600,8757,29483,105376, 367158,1274598,4608221,16375729,57962319, 211204408,760061396,2725968135,9991147348, 36270853154,131314876548,483493516444, 1766591345713,6440568928849,23800489289355, 87397562097188,320347178631384,1187331037023229, 4377412784930187] |