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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 18 |
| 4 | 76 |
| 5 | 123 |
| 6 | 322 |
| 7 | 843 |
| 8 | 1364 |
| 9 | 5778 |
| 10 | 15127 |
| 11 | 24476 |
| 12 | 39603 |
| 13 | 64079 |
| 14 | 103682 |
| 15 | 167761 |
| 16 | 271443 |
| 17 | 439204 |
| 18 | 710647 |
| 19 | 1149851 |
| 20 | 1860498 |
| 21 | 4870847 |
| 22 | 7881196 |
| 23 | 12752043 |
| 24 | 20633239 |
| 25 | 33385282 |
| 26 | 87403803 |
| 27 | 141422324 |
| 28 | 228826127 |
| 29 | 599074578 |
| 30 | 969323029 |
| 31 | 1568397607 |
| 32 | 2537720636 |
| 33 | 4106118243 |
| 34 | 10749957122 |
| 35 | 17393796001 |
| 36 | 28143753123 |
[1,4,18,76,123,322,843,1364,5778,15127,24476, 39603,64079,103682,167761,271443,439204,710647, 1149851,1860498,4870847,7881196,12752043,20633239, 33385282,87403803,141422324,228826127,599074578, 969323029,1568397607,2537720636,4106118243, 10749957122,17393796001,28143753123] |