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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 9 |
| 3 | 19 |
| 4 | 36 |
| 5 | 64 |
| 6 | 111 |
| 7 | 187 |
| 8 | 312 |
| 9 | 515 |
| 10 | 844 |
| 11 | 1378 |
| 12 | 2243 |
| 13 | 3643 |
| 14 | 5910 |
| 15 | 9578 |
| 16 | 15515 |
| 17 | 25122 |
| 18 | 40667 |
| 19 | 65821 |
| 20 | 106521 |
| 21 | 172377 |
| 22 | 278935 |
| 23 | 451350 |
| 24 | 730325 |
| 25 | 1181717 |
| 26 | 1912085 |
| 27 | 3093847 |
| 28 | 5005978 |
| 29 | 8099873 |
[1,4,9,19,36,64,111,187,312,515,844,1378,2243, 3643,5910,9578,15515,25122,40667,65821,106521, 172377,278935,451350,730325,1181717,1912085, 3093847,5005978,8099873] |