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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 9 |
| 6 | 21 |
| 7 | 41 |
| 8 | 79 |
| 9 | 169 |
| 10 | 393 |
| 11 | 913 |
| 12 | 2051 |
| 13 | 4537 |
| 14 | 10165 |
| 15 | 23257 |
| 16 | 53759 |
| 17 | 124153 |
| 18 | 286009 |
| 19 | 660161 |
| 20 | 1531875 |
| 21 | 3571753 |
| 22 | 8348981 |
| 23 | 19539209 |
| 24 | 45792719 |
| 25 | 107546633 |
| 26 | 253153609 |
| 27 | 597034609 |
| 28 | 1410131683 |
| 29 | 3334984025 |
| 30 | 7897992213 |
| 31 | 18730123449 |
| 32 | 44476842431 |
| 33 | 105740699609 |
| 34 | 251664629689 |
[1,1,1,1,3,9,21,41,79,169,393,913,2051,4537,10165, 23257,53759,124153,286009,660161,1531875,3571753, 8348981,19539209,45792719,107546633,253153609, 597034609,1410131683,3334984025,7897992213, 18730123449,44476842431,105740699609,251664629689] |