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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 6 |
| 2 | 8 |
| 3 | 22 |
| 4 | 58 |
| 5 | 146 |
| 6 | 372 |
| 7 | 948 |
| 8 | 2414 |
| 9 | 6148 |
| 10 | 15658 |
| 11 | 39878 |
| 12 | 101562 |
| 13 | 258660 |
| 14 | 658760 |
| 15 | 1677742 |
| 16 | 4272904 |
| 17 | 10882310 |
| 18 | 27715266 |
| 19 | 70585746 |
| 20 | 179769068 |
| 21 | 457839148 |
| 22 | 1166033110 |
| 23 | 2969674436 |
| 24 | 7563221130 |
| 25 | 19262149806 |
| 26 | 49057195178 |
| 27 | 124939761292 |
| 28 | 318198867568 |
| 29 | 810394691606 |
| 30 | 2063928012072 |
| 31 | 5256449583318 |
| 32 | 13387221870314 |
| 33 | 34094821336018 |
[0,6,8,22,58,146,372,948,2414,6148,15658,39878, 101562,258660,658760,1677742,4272904,10882310, 27715266,70585746,179769068,457839148,1166033110, 2969674436,7563221130,19262149806,49057195178, 124939761292,318198867568,810394691606, 2063928012072,5256449583318,13387221870314, 34094821336018] |