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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 9 |
| 3 | 28 |
| 4 | 78 |
| 5 | 171 |
| 6 | 350 |
| 7 | 650 |
| 8 | 1142 |
| 9 | 1868 |
| 10 | 2949 |
| 11 | 4454 |
| 12 | 6554 |
| 13 | 9361 |
| 14 | 13071 |
| 15 | 17829 |
| 16 | 23929 |
| 17 | 31576 |
| 18 | 41080 |
| 19 | 52705 |
| 20 | 66899 |
| 21 | 83871 |
| 22 | 104326 |
| 23 | 128432 |
| 24 | 156793 |
| 25 | 190022 |
| 26 | 228672 |
| 27 | 273250 |
| 28 | 324752 |
| 29 | 383434 |
| 30 | 450569 |
| 31 | 526647 |
| 32 | 612832 |
| 33 | 709667 |
| 34 | 818736 |
| 35 | 940570 |
| 36 | 1076447 |
| 37 | 1227802 |
[2,9,28,78,171,350,650,1142,1868,2949,4454,6554, 9361,13071,17829,23929,31576,41080,52705,66899, 83871,104326,128432,156793,190022,228672,273250, 324752,383434,450569,526647,612832,709667,818736, 940570,1076447,1227802] |