| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 14 |
| 5 | 20 |
| 6 | 26 |
| 7 | 50 |
| 8 | 52 |
| 9 | 92 |
| 10 | 120 |
| 11 | 174 |
| 12 | 180 |
| 13 | 190 |
| 14 | 290 |
| 15 | 320 |
| 16 | 390 |
| 17 | 432 |
| 18 | 616 |
| 19 | 830 |
| 20 | 1804 |
| 21 | 2256 |
| 22 | 6614 |
| 23 | 13496 |
| 24 | 15494 |
| 25 | 16696 |
| 26 | 22386 |
| 27 | 54486 |
| 28 | 88066 |
| 29 | 95330 |
| 30 | 207084 |
| 31 | 283034 |
| 32 | 561816 |
| 33 | 804534 |
| 34 | 811230 |
| 35 | 1491852 |
| 36 | 2139912 |
| 37 | 2167800 |
| 38 | 2915954 |
| 39 | 3015762 |
| 40 | 3511774 |
| 41 | 5775996 |
[2,4,6,14,20,26,50,52,92,120,174,180,190,290,320, 390,432,616,830,1804,2256,6614,13496,15494,16696, 22386,54486,88066,95330,207084,283034,561816, 804534,811230,1491852,2139912,2167800,2915954, 3015762,3511774,5775996] |