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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 4 |
| 6 | 6 |
| 7 | 16 |
| 8 | 52 |
| 9 | 148 |
| 10 | 364 |
| 11 | 861 |
| 12 | 1983 |
| 13 | 4458 |
| 14 | 10260 |
| 15 | 24881 |
| 16 | 63339 |
| 17 | 167035 |
| 18 | 448673 |
| 19 | 1207450 |
| 20 | 3226010 |
| 21 | 8544369 |
| 22 | 22478369 |
| 23 | 58905246 |
| 24 | 154187918 |
| 25 | 403928406 |
| 26 | 1060043106 |
| 27 | 2787736717 |
| 28 | 7348365111 |
| 29 | 19422984322 |
| 30 | 51509520556 |
| 31 | 137150272684 |
| 32 | 366847701440 |
| 33 | 986008997934 |
| 34 | 2662974001118 |
| 35 | 7224478109771 |
| 36 | 19678015523249 |
[1,1,1,3,4,6,16,52,148,364,861,1983,4458,10260, 24881,63339,167035,448673,1207450,3226010,8544369, 22478369,58905246,154187918,403928406,1060043106, 2787736717,7348365111,19422984322,51509520556, 137150272684,366847701440,986008997934, 2662974001118,7224478109771,19678015523249] |