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A249562 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 43 |
| 6 | 143 |
| 7 | 509 |
| 8 | 1921 |
| 9 | 7631 |
| 10 | 31725 |
| 11 | 137412 |
| 12 | 617822 |
| 13 | 2874819 |
| 14 | 13809305 |
| 15 | 68331089 |
| 16 | 347657464 |
| 17 | 1815839759 |
| 18 | 9722708061 |
| 19 | 53301771604 |
| 20 | 298854490602 |
| 21 | 1712023130016 |
| 22 | 10011533550216 |
| 23 | 59714205975048 |
| 24 | 363008132101658 |
| 25 | 2247599137530241 |
| 26 | 14164805684388087 |
| 27 | 90810818671081267 |
| 28 | 591921142070249872 |
[1,1,2,5,14,43,143,509,1921,7631,31725,137412, 617822,2874819,13809305,68331089,347657464, 1815839759,9722708061,53301771604,298854490602, 1712023130016,10011533550216,59714205975048, 363008132101658,2247599137530241, 14164805684388087,90810818671081267, 591921142070249872] |