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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 24 |
| 2 | 108 |
| 3 | 468 |
| 4 | 1980 |
| 5 | 8244 |
| 6 | 33948 |
| 7 | 138708 |
| 8 | 563580 |
| 9 | 2280564 |
| 10 | 9200988 |
| 11 | 37040148 |
| 12 | 148869180 |
| 13 | 597602484 |
| 14 | 2396787228 |
| 15 | 9606280788 |
| 16 | 38482518780 |
| 17 | 154102262004 |
| 18 | 616925608668 |
| 19 | 2469252116628 |
| 20 | 9881657512380 |
| 21 | 39540577187124 |
| 22 | 158204150161308 |
| 23 | 632942124883668 |
[5,24,108,468,1980,8244,33948,138708,563580, 2280564,9200988,37040148,148869180,597602484, 2396787228,9606280788,38482518780,154102262004, 616925608668,2469252116628,9881657512380, 39540577187124,158204150161308,632942124883668] |