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| n | a(n) |
|---|---|
| 1 | 462 |
| 2 | 1734 |
| 3 | 6534 |
| 4 | 24582 |
| 5 | 92478 |
| 6 | 347934 |
| 7 | 1309038 |
| 8 | 4924998 |
| 9 | 18529350 |
| 10 | 69713094 |
| 11 | 262282014 |
| 12 | 986785278 |
| 13 | 3712588494 |
| 14 | 13967895174 |
| 15 | 52551500358 |
| 16 | 197714842182 |
| 17 | 743863801278 |
| 18 | 2798643484446 |
| 19 | 10529354082798 |
| 20 | 39614655463302 |
[462,1734,6534,24582,92478,347934,1309038,4924998, 18529350,69713094,262282014,986785278,3712588494, 13967895174,52551500358,197714842182,743863801278, 2798643484446,10529354082798,39614655463302] |