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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 13 |
| 3 | 35 |
| 4 | 113 |
| 5 | 355 |
| 6 | 1105 |
| 7 | 3435 |
| 8 | 10625 |
| 9 | 32723 |
| 10 | 100433 |
| 11 | 307323 |
| 12 | 937985 |
| 13 | 2856547 |
| 14 | 8682897 |
| 15 | 26349835 |
| 16 | 79850241 |
| 17 | 241679859 |
| 18 | 730700881 |
| 19 | 2207155867 |
| 20 | 6661493633 |
| 21 | 20090908803 |
| 22 | 60555714705 |
| 23 | 182419600683 |
| 24 | 549259559297 |
| 25 | 1653098625555 |
| 26 | 4973441442385 |
| 27 | 14957936920763 |
[5,13,35,113,355,1105,3435,10625,32723,100433, 307323,937985,2856547,8682897,26349835,79850241, 241679859,730700881,2207155867,6661493633, 20090908803,60555714705,182419600683,549259559297, 1653098625555,4973441442385,14957936920763] |