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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 23 |
| 3 | 82 |
| 4 | 456 |
| 5 | 2207 |
| 6 | 10949 |
| 7 | 54357 |
| 8 | 269732 |
| 9 | 1337127 |
| 10 | 6635686 |
| 11 | 32914816 |
| 12 | 163277978 |
| 13 | 810008547 |
| 14 | 4018201206 |
| 15 | 19933310071 |
| 16 | 98884549774 |
| 17 | 490541211576 |
| 18 | 2433455551301 |
| 19 | 12071779000380 |
| 20 | 59885128155030 |
| 21 | 297075468364227 |
| 22 | 1473718630523999 |
[1,23,82,456,2207,10949,54357,269732,1337127, 6635686,32914816,163277978,810008547,4018201206, 19933310071,98884549774,490541211576, 2433455551301,12071779000380,59885128155030, 297075468364227,1473718630523999] |