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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 21 |
| 5 | 46 |
| 6 | 86 |
| 7 | 359 |
| 8 | 914 |
| 9 | 1432 |
| 10 | 1682 |
| 11 | 1810 |
| 12 | 1816 |
| 13 | 2840 |
| 14 | 3608 |
| 15 | 15141 |
| 16 | 15909 |
| 17 | 24120 |
| 18 | 28197 |
| 19 | 30245 |
| 20 | 31781 |
| 21 | 16514098 |
| 22 | 66058853 |
| 23 | 67105381 |
| 24 | 117437029 |
| 25 | 134148709 |
| 26 | 134210149 |
| 27 | 234873445 |
| 28 | 251650661 |
| 29 | 267903589 |
| 30 | 268411493 |
| 31 | 268419685 |
| 32 | 402637413 |
| 33 | 532660837 |
| 34 | 534757989 |
[1,4,6,21,46,86,359,914,1432,1682,1810,1816,2840, 3608,15141,15909,24120,28197,30245,31781,16514098, 66058853,67105381,117437029,134148709,134210149, 234873445,251650661,267903589,268411493,268419685, 402637413,532660837,534757989] |