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| n | a(n) |
|---|---|
| 1 | 72 |
| 2 | 130 |
| 3 | 216 |
| 4 | 350 |
| 5 | 572 |
| 6 | 962 |
| 7 | 1680 |
| 8 | 3046 |
| 9 | 5700 |
| 10 | 10922 |
| 11 | 21272 |
| 12 | 41870 |
| 13 | 82956 |
| 14 | 165010 |
| 15 | 328992 |
| 16 | 656822 |
| 17 | 1312340 |
| 18 | 2623226 |
| 19 | 5244840 |
| 20 | 10487902 |
| 21 | 20973852 |
| 22 | 41945570 |
| 23 | 83888816 |
| 24 | 167775110 |
| 25 | 335547492 |
| 26 | 671092042 |
| 27 | 1342180920 |
| 28 | 2684358446 |
| 29 | 5368713260 |
[72,130,216,350,572,962,1680,3046,5700,10922, 21272,41870,82956,165010,328992,656822,1312340, 2623226,5244840,10487902,20973852,41945570, 83888816,167775110,335547492,671092042,1342180920, 2684358446,5368713260] |