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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 14 |
| 4 | 22 |
| 5 | 68 |
| 6 | 163 |
| 7 | 320 |
| 8 | 782 |
| 9 | 1889 |
| 10 | 4109 |
| 11 | 9474 |
| 12 | 22365 |
| 13 | 50630 |
| 14 | 115709 |
| 15 | 268817 |
| 16 | 616265 |
| 17 | 1410697 |
| 18 | 3253586 |
| 19 | 7480630 |
| 20 | 17161490 |
| 21 | 39477589 |
| 22 | 90787636 |
| 23 | 208528864 |
| 24 | 479338273 |
| 25 | 1102090695 |
| 26 | 2532624372 |
| 27 | 5820869563 |
| 28 | 13380882748 |
| 29 | 30754476169 |
[1,7,14,22,68,163,320,782,1889,4109,9474,22365, 50630,115709,268817,616265,1410697,3253586, 7480630,17161490,39477589,90787636,208528864, 479338273,1102090695,2532624372,5820869563, 13380882748,30754476169] |