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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 56 |
| 2 | 938 |
| 3 | 7688 |
| 4 | 39746 |
| 5 | 150248 |
| 6 | 455114 |
| 7 | 1171928 |
| 8 | 2668610 |
| 9 | 5521880 |
| 10 | 10585514 |
| 11 | 19068392 |
| 12 | 32622338 |
| 13 | 53439752 |
| 14 | 84361034 |
| 15 | 128991800 |
| 16 | 191829890 |
| 17 | 278402168 |
| 18 | 395411114 |
| 19 | 550891208 |
| 20 | 754375106 |
| 21 | 1017069608 |
| 22 | 1352041418 |
| 23 | 1774412696 |
| 24 | 2301566402 |
| 25 | 2953361432 |
| 26 | 3752357546 |
| 27 | 4724050088 |
| 28 | 5897114498 |
[1,56,938,7688,39746,150248,455114,1171928, 2668610,5521880,10585514,19068392,32622338, 53439752,84361034,128991800,191829890,278402168, 395411114,550891208,754375106,1017069608, 1352041418,1774412696,2301566402,2953361432, 3752357546,4724050088,5897114498] |