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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 26 |
| 3 | 94 |
| 4 | 251 |
| 5 | 555 |
| 6 | 1079 |
| 7 | 1911 |
| 8 | 3154 |
| 9 | 4926 |
| 10 | 7360 |
| 11 | 10604 |
| 12 | 14821 |
| 13 | 20189 |
| 14 | 26901 |
| 15 | 35165 |
| 16 | 45204 |
| 17 | 57256 |
| 18 | 71574 |
| 19 | 88426 |
| 20 | 108095 |
| 21 | 130879 |
| 22 | 157091 |
| 23 | 187059 |
| 24 | 221126 |
| 25 | 259650 |
| 26 | 303004 |
| 27 | 351576 |
| 28 | 405769 |
| 29 | 466001 |
| 30 | 532705 |
| 31 | 606329 |
| 32 | 687336 |
| 33 | 776204 |
| 34 | 873426 |
[0,4,26,94,251,555,1079,1911,3154,4926,7360,10604, 14821,20189,26901,35165,45204,57256,71574,88426, 108095,130879,157091,187059,221126,259650,303004, 351576,405769,466001,532705,606329,687336,776204, 873426] |