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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 4 |
| 8 | 8 |
| 9 | 16 |
| 10 | 32 |
| 11 | 65 |
| 12 | 138 |
| 13 | 315 |
| 14 | 782 |
| 15 | 2090 |
| 16 | 5885 |
| 17 | 17112 |
| 18 | 50743 |
| 19 | 152705 |
| 20 | 466760 |
| 21 | 1455562 |
| 22 | 4658963 |
| 23 | 15392116 |
| 24 | 52663709 |
| 25 | 186632887 |
| 26 | 683133153 |
| 27 | 2570929570 |
| 28 | 9900731604 |
| 29 | 38864321047 |
| 30 | 155126476313 |
| 31 | 629028834312 |
| 32 | 2592051975917 |
[1,1,1,1,1,2,4,8,16,32,65,138,315,782,2090,5885, 17112,50743,152705,466760,1455562,4658963, 15392116,52663709,186632887,683133153,2570929570, 9900731604,38864321047,155126476313,629028834312, 2592051975917] |