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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 8 |
| 3 | 15 |
| 4 | 27 |
| 5 | 42 |
| 6 | 69 |
| 7 | 102 |
| 8 | 155 |
| 9 | 225 |
| 10 | 327 |
| 11 | 458 |
| 12 | 652 |
| 13 | 894 |
| 14 | 1232 |
| 15 | 1669 |
| 16 | 2257 |
| 17 | 2999 |
| 18 | 3996 |
| 19 | 5242 |
| 20 | 6877 |
| 21 | 8928 |
| 22 | 11564 |
| 23 | 14845 |
| 24 | 19045 |
| 25 | 24223 |
| 26 | 30756 |
| 27 | 38815 |
| 28 | 48877 |
| 29 | 61195 |
| 30 | 76496 |
| 31 | 95124 |
| 32 | 118067 |
| 33 | 145930 |
| 34 | 179991 |
| 35 | 221160 |
| 36 | 271268 |
| 37 | 331538 |
| 38 | 404463 |
| 39 | 491948 |
| 40 | 597253 |
[0,3,8,15,27,42,69,102,155,225,327,458,652,894, 1232,1669,2257,2999,3996,5242,6877,8928,11564, 14845,19045,24223,30756,38815,48877,61195,76496, 95124,118067,145930,179991,221160,271268,331538, 404463,491948,597253] |