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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 81 |
| 4 | 254 |
| 5 | 578 |
| 6 | 1030 |
| 7 | 1610 |
| 8 | 2318 |
| 9 | 3154 |
| 10 | 4118 |
| 11 | 5210 |
| 12 | 6430 |
| 13 | 7778 |
| 14 | 9254 |
| 15 | 10858 |
| 16 | 12590 |
| 17 | 14450 |
| 18 | 16438 |
| 19 | 18554 |
| 20 | 20798 |
| 21 | 23170 |
| 22 | 25670 |
| 23 | 28298 |
| 24 | 31054 |
| 25 | 33938 |
| 26 | 36950 |
| 27 | 40090 |
| 28 | 43358 |
| 29 | 46754 |
| 30 | 50278 |
| 31 | 53930 |
| 32 | 57710 |
| 33 | 61618 |
| 34 | 65654 |
| 35 | 69818 |
| 36 | 74110 |
| 37 | 78530 |
| 38 | 83078 |
| 39 | 87754 |
| 40 | 92558 |
[0,2,81,254,578,1030,1610,2318,3154,4118,5210, 6430,7778,9254,10858,12590,14450,16438,18554, 20798,23170,25670,28298,31054,33938,36950,40090, 43358,46754,50278,53930,57710,61618,65654,69818, 74110,78530,83078,87754,92558] |