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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 12 |
| 6 | 20 |
| 7 | 28 |
| 8 | 44 |
| 9 | 60 |
| 10 | 92 |
| 11 | 124 |
| 12 | 188 |
| 13 | 252 |
| 14 | 380 |
| 15 | 508 |
| 16 | 764 |
| 17 | 1020 |
| 18 | 1532 |
| 19 | 2044 |
| 20 | 3068 |
| 21 | 4092 |
| 22 | 6140 |
| 23 | 8188 |
| 24 | 12284 |
| 25 | 16380 |
| 26 | 24572 |
| 27 | 32764 |
| 28 | 49148 |
| 29 | 65532 |
| 30 | 98300 |
| 31 | 131068 |
| 32 | 196604 |
| 33 | 262140 |
| 34 | 393212 |
| 35 | 524284 |
| 36 | 786428 |
| 37 | 1048572 |
| 38 | 1572860 |
| 39 | 2097148 |
| 40 | 3145724 |
| 41 | 4194300 |
| 42 | 6291452 |
[0,2,4,8,12,20,28,44,60,92,124,188,252,380,508, 764,1020,1532,2044,3068,4092,6140,8188,12284, 16380,24572,32764,49148,65532,98300,131068,196604, 262140,393212,524284,786428,1048572,1572860, 2097148,3145724,4194300,6291452] |