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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 11 |
| 6 | 15 |
| 7 | 41 |
| 8 | 56 |
| 9 | 153 |
| 10 | 209 |
| 11 | 571 |
| 12 | 780 |
| 13 | 2131 |
| 14 | 2911 |
| 15 | 7953 |
| 16 | 10864 |
| 17 | 29681 |
| 18 | 40545 |
| 19 | 110771 |
| 20 | 151316 |
| 21 | 413403 |
| 22 | 564719 |
| 23 | 1542841 |
| 24 | 2107560 |
| 25 | 5757961 |
| 26 | 7865521 |
| 27 | 21489003 |
| 28 | 29354524 |
| 29 | 80198051 |
| 30 | 109552575 |
| 31 | 299303201 |
| 32 | 408855776 |
| 33 | 1117014753 |
| 34 | 1525870529 |
| 35 | 4168755811 |
[0,1,1,3,4,11,15,41,56,153,209,571,780,2131,2911, 7953,10864,29681,40545,110771,151316,413403, 564719,1542841,2107560,5757961,7865521,21489003, 29354524,80198051,109552575,299303201,408855776, 1117014753,1525870529,4168755811] |