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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 15 |
| 4 | 33 |
| 5 | 51 |
| 6 | 81 |
| 7 | 111 |
| 8 | 177 |
| 9 | 243 |
| 10 | 345 |
| 11 | 447 |
| 12 | 609 |
| 13 | 771 |
| 14 | 993 |
| 15 | 1215 |
| 16 | 1569 |
| 17 | 1923 |
| 18 | 2409 |
| 19 | 2895 |
| 20 | 3585 |
| 21 | 4275 |
| 22 | 5169 |
| 23 | 6063 |
| 24 | 7281 |
| 25 | 8499 |
| 26 | 10041 |
| 27 | 11583 |
| 28 | 13569 |
| 29 | 15555 |
| 30 | 17985 |
| 31 | 20415 |
| 32 | 23553 |
| 33 | 26691 |
| 34 | 30537 |
| 35 | 34383 |
| 36 | 39201 |
| 37 | 44019 |
| 38 | 49809 |
| 39 | 55599 |
| 40 | 62769 |
| 41 | 69939 |
| 42 | 78489 |
| 43 | 87039 |
[1,3,9,15,33,51,81,111,177,243,345,447,609,771, 993,1215,1569,1923,2409,2895,3585,4275,5169,6063, 7281,8499,10041,11583,13569,15555,17985,20415, 23553,26691,30537,34383,39201,44019,49809,55599, 62769,69939,78489,87039] |