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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 26 |
| 3 | 78 |
| 4 | 172 |
| 5 | 324 |
| 6 | 546 |
| 7 | 850 |
| 8 | 1252 |
| 9 | 1764 |
| 10 | 2398 |
| 11 | 3170 |
| 12 | 4092 |
| 13 | 5176 |
| 14 | 6438 |
| 15 | 7890 |
| 16 | 9544 |
| 17 | 11416 |
| 18 | 13518 |
| 19 | 15862 |
| 20 | 18464 |
| 21 | 21336 |
| 22 | 24490 |
| 23 | 27942 |
| 24 | 31704 |
| 25 | 35788 |
| 26 | 40210 |
| 27 | 44982 |
| 28 | 50116 |
| 29 | 55628 |
| 30 | 61530 |
| 31 | 67834 |
| 32 | 74556 |
| 33 | 81708 |
| 34 | 89302 |
| 35 | 97354 |
| 36 | 105876 |
| 37 | 114880 |
| 38 | 124382 |
| 39 | 134394 |
[4,26,78,172,324,546,850,1252,1764,2398,3170,4092, 5176,6438,7890,9544,11416,13518,15862,18464,21336, 24490,27942,31704,35788,40210,44982,50116,55628, 61530,67834,74556,81708,89302,97354,105876,114880, 124382,134394] |