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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 22 |
| 2 | 74 |
| 3 | 195 |
| 4 | 441 |
| 5 | 896 |
| 6 | 1680 |
| 7 | 2958 |
| 8 | 4950 |
| 9 | 7942 |
| 10 | 12298 |
| 11 | 18473 |
| 12 | 27027 |
| 13 | 38640 |
| 14 | 54128 |
| 15 | 74460 |
| 16 | 100776 |
| 17 | 134406 |
| 18 | 176890 |
| 19 | 229999 |
| 20 | 295757 |
| 21 | 376464 |
| 22 | 474720 |
| 23 | 593450 |
| 24 | 735930 |
| 25 | 905814 |
| 26 | 1107162 |
| 27 | 1344469 |
| 28 | 1622695 |
| 29 | 1947296 |
[4,22,74,195,441,896,1680,2958,4950,7942,12298, 18473,27027,38640,54128,74460,100776,134406, 176890,229999,295757,376464,474720,593450,735930, 905814,1107162,1344469,1622695,1947296] |