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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 13 |
| 4 | 20 |
| 5 | 46 |
| 6 | 157 |
| 7 | 236 |
| 8 | 532 |
| 9 | 1198 |
| 10 | 4045 |
| 11 | 6068 |
| 12 | 13654 |
| 13 | 46084 |
| 14 | 103690 |
| 15 | 1181101 |
| 16 | 1771652 |
| 17 | 3986218 |
| 18 | 102162424 |
| 19 | 229865455 |
| 20 | 344798183 |
| 21 | 517197275 |
| 22 | 775795913 |
| 23 | 1163693870 |
| 24 | 3927466813 |
| 25 | 5891200220 |
| 26 | 13255200496 |
| 27 | 29824201117 |
| 28 | 44736301676 |
| 29 | 100656678772 |
| 30 | 226477527238 |
[1,2,13,20,46,157,236,532,1198,4045,6068,13654, 46084,103690,1181101,1771652,3986218,102162424, 229865455,344798183,517197275,775795913, 1163693870,3927466813,5891200220,13255200496, 29824201117,44736301676,100656678772,226477527238] |