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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 18 |
| 5 | 41 |
| 6 | 85 |
| 7 | 162 |
| 8 | 287 |
| 9 | 478 |
| 10 | 756 |
| 11 | 1145 |
| 12 | 1672 |
| 13 | 2367 |
| 14 | 3263 |
| 15 | 4396 |
| 16 | 5805 |
| 17 | 7532 |
| 18 | 9622 |
| 19 | 12123 |
| 20 | 15086 |
| 21 | 18565 |
| 22 | 22617 |
| 23 | 27302 |
| 24 | 32683 |
| 25 | 38826 |
| 26 | 45800 |
| 27 | 53677 |
| 28 | 62532 |
| 29 | 72443 |
| 30 | 83491 |
| 31 | 95760 |
| 32 | 109337 |
| 33 | 124312 |
| 34 | 140778 |
| 35 | 158831 |
| 36 | 178570 |
| 37 | 200097 |
| 38 | 223517 |
| 39 | 248938 |
| 40 | 276471 |
[1,1,2,7,18,41,85,162,287,478,756,1145,1672,2367, 3263,4396,5805,7532,9622,12123,15086,18565,22617, 27302,32683,38826,45800,53677,62532,72443,83491, 95760,109337,124312,140778,158831,178570,200097, 223517,248938,276471] |