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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 18 |
| 4 | 115 |
| 5 | 1710 |
| 6 | 83973 |
| 7 | 22263378 |
| 8 | 64146328635 |
| 9 | 5387481983035854 |
| 10 | 53332505278384935836485 |
| 11 | 448356696524549059043145139274042 |
| 12 | 52321110785739610206886887435107004491768788251 |
| 13 | 4402157583106925818769478699470667613674438846830415891359277374958 |
| 14 | 71336346872409035510345323533390649100576348044074421590685110464047512124710404684631077386973 |
[1,2,5,18,115,1710,83973,22263378,64146328635, 5387481983035854,53332505278384935836485, 448356696524549059043145139274042, 52321110785739610206886887435107004491768788251, 44021575831069258187694786994706676136744388468304\ 15891359277374958, 71336346872409035510345323533390649100576348044074\ 421590685110464047512124710404684631077386973] |