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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 6 |
| 2 | 8 |
| 3 | 12 |
| 4 | 20 |
| 5 | 34 |
| 6 | 56 |
| 7 | 88 |
| 8 | 132 |
| 9 | 190 |
| 10 | 264 |
| 11 | 356 |
| 12 | 468 |
| 13 | 602 |
| 14 | 760 |
| 15 | 944 |
| 16 | 1156 |
| 17 | 1398 |
| 18 | 1672 |
| 19 | 1980 |
| 20 | 2324 |
| 21 | 2706 |
| 22 | 3128 |
| 23 | 3592 |
| 24 | 4100 |
| 25 | 4654 |
| 26 | 5256 |
| 27 | 5908 |
| 28 | 6612 |
| 29 | 7370 |
| 30 | 8184 |
| 31 | 9056 |
| 32 | 9988 |
| 33 | 10982 |
| 34 | 12040 |
| 35 | 13164 |
| 36 | 14356 |
[4,6,8,12,20,34,56,88,132,190,264,356,468,602,760, 944,1156,1398,1672,1980,2324,2706,3128,3592,4100, 4654,5256,5908,6612,7370,8184,9056,9988,10982, 12040,13164,14356] |