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| n | a(n) |
|---|---|
| 1 | 19 |
| 2 | 103 |
| 3 | 691 |
| 4 | 2309 |
| 5 | 10957 |
| 6 | 19403 |
| 7 | 47657 |
| 8 | 69031 |
| 9 | 130073 |
| 10 | 279431 |
| 11 | 347707 |
| 12 | 620531 |
| 13 | 867677 |
| 14 | 1013609 |
| 15 | 1353887 |
| 16 | 1999121 |
| 17 | 2829503 |
| 18 | 3152099 |
| 19 | 4268039 |
| 20 | 5145347 |
| 21 | 5628457 |
| 22 | 7258871 |
| 23 | 8510507 |
| 24 | 10651117 |
| 25 | 14042671 |
| 26 | 15986303 |
| 27 | 17023271 |
| 28 | 19235537 |
| 29 | 20411623 |
| 30 | 22909613 |
| 31 | 33289481 |
[19,103,691,2309,10957,19403,47657,69031,130073, 279431,347707,620531,867677,1013609,1353887, 1999121,2829503,3152099,4268039,5145347,5628457, 7258871,8510507,10651117,14042671,15986303, 17023271,19235537,20411623,22909613,33289481] |