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| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | 4 |
| 1 | 8 |
| 2 | 22 |
| 3 | 42 |
| 4 | 70 |
| 5 | 155 |
| 6 | 246 |
| 7 | 421 |
| 8 | 722 |
| 9 | 1101 |
| 10 | 1730 |
| 11 | 2761 |
| 12 | 4062 |
| 13 | 6106 |
| 14 | 9040 |
| 15 | 13065 |
| 16 | 18806 |
| 17 | 27081 |
| 18 | 37950 |
| 19 | 53183 |
| 20 | 74290 |
| 21 | 102213 |
| 22 | 140048 |
| 23 | 191612 |
| 24 | 258426 |
| 25 | 348300 |
| 26 | 467484 |
| 27 | 622023 |
| 28 | 825016 |
| 29 | 1090957 |
| 30 | 1432290 |
| 31 | 1875930 |
| 32 | 2448610 |
| 33 | 3179136 |
| 34 | 4114996 |
[1,4,8,22,42,70,155,246,421,722,1101,1730,2761, 4062,6106,9040,13065,18806,27081,37950,53183, 74290,102213,140048,191612,258426,348300,467484, 622023,825016,1090957,1432290,1875930,2448610, 3179136,4114996] |