| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 10 |
| 5 | 20 |
| 6 | 26 |
| 7 | 32 |
| 8 | 56 |
| 9 | 80 |
| 10 | 86 |
| 11 | 116 |
| 12 | 122 |
| 13 | 152 |
| 14 | 176 |
| 15 | 214 |
| 16 | 218 |
| 17 | 248 |
| 18 | 332 |
| 19 | 382 |
| 20 | 422 |
| 21 | 446 |
| 22 | 556 |
| 23 | 586 |
| 24 | 596 |
| 25 | 620 |
| 26 | 634 |
| 27 | 904 |
| 28 | 928 |
| 29 | 1138 |
| 30 | 1144 |
| 31 | 1180 |
| 32 | 1354 |
| 33 | 1388 |
| 34 | 1390 |
| 35 | 1474 |
| 36 | 1600 |
| 37 | 1684 |
| 38 | 3112 |
| 39 | 3554 |
| 40 | 5128 |
[2,4,6,10,20,26,32,56,80,86,116,122,152,176,214, 218,248,332,382,422,446,556,586,596,620,634,904, 928,1138,1144,1180,1354,1388,1390,1474,1600,1684, 3112,3554,5128] |