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| n | a(n) |
|---|---|
| 1 | 2423 |
| 2 | 5939 |
| 3 | 14137 |
| 4 | 40492 |
| 5 | 109250 |
| 6 | 258031 |
| 7 | 576326 |
| 8 | 1231872 |
| 9 | 2547861 |
| 10 | 5124950 |
| 11 | 10170603 |
| 12 | 19679796 |
| 13 | 37067302 |
| 14 | 68991907 |
| 15 | 127544546 |
| 16 | 232985318 |
| 17 | 421049046 |
| 18 | 754742881 |
| 19 | 1343411988 |
| 20 | 2377050180 |
| 21 | 4185913747 |
| 22 | 7337463337 |
| 23 | 12807179775 |
[2423,5939,14137,40492,109250,258031,576326, 1231872,2547861,5124950,10170603,19679796, 37067302,68991907,127544546,232985318,421049046, 754742881,1343411988,2377050180,4185913747, 7337463337,12807179775] |