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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 5 |
| 3 | 0 |
| 4 | 23 |
| 5 | 4 |
| 6 | 85 |
| 7 | 20 |
| 8 | 321 |
| 9 | 92 |
| 10 | 1365 |
| 11 | 344 |
| 12 | 5147 |
| 13 | 1498 |
| 14 | 21824 |
| 15 | 5535 |
| 16 | 82320 |
| 17 | 23831 |
| 18 | 348508 |
| 19 | 87317 |
| 20 | 1318732 |
| 21 | 381125 |
| 22 | 5588628 |
| 23 | 1414805 |
| 24 | 21075092 |
| 25 | 6096001 |
| 26 | 89224380 |
| 27 | 22402217 |
| 28 | 337601664 |
| 29 | 97608767 |
| 30 | 1430611386 |
| 31 | 361842384 |
| 32 | 5395273271 |
| 33 | 1562208940 |
| 34 | 22839914069 |
[1,0,5,0,23,4,85,20,321,92,1365,344,5147,1498, 21824,5535,82320,23831,348508,87317,1318732, 381125,5588628,1414805,21075092,6096001,89224380, 22402217,337601664,97608767,1430611386,361842384, 5395273271,1562208940,22839914069] |