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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 11 |
| 4 | 19 |
| 5 | 47 |
| 6 | 73 |
| 7 | 182 |
| 8 | 290 |
| 9 | 724 |
| 10 | 1219 |
| 11 | 2871 |
| 12 | 4849 |
| 13 | 11470 |
| 14 | 20276 |
| 15 | 47091 |
| 16 | 74975 |
| 17 | 187341 |
| 18 | 318004 |
| 19 | 727411 |
| 20 | 1240687 |
| 21 | 2934757 |
| 22 | 5209432 |
| 23 | 12023829 |
| 24 | 19225632 |
| 25 | 47713233 |
| 26 | 81662862 |
| 27 | 185986804 |
| 28 | 316722211 |
| 29 | 752826207 |
| 30 | 1330639641 |
| 31 | 3073765286 |
| 32 | 4929423900 |
| 33 | 12235764207 |
[1,2,4,11,19,47,73,182,290,724,1219,2871,4849, 11470,20276,47091,74975,187341,318004,727411, 1240687,2934757,5209432,12023829,19225632, 47713233,81662862,185986804,316722211,752826207, 1330639641,3073765286,4929423900,12235764207] |