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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 36 |
| 4 | 104 |
| 5 | 257 |
| 6 | 549 |
| 7 | 1058 |
| 8 | 1896 |
| 9 | 3199 |
| 10 | 5145 |
| 11 | 7926 |
| 12 | 11768 |
| 13 | 16967 |
| 14 | 23859 |
| 15 | 32846 |
| 16 | 44378 |
| 17 | 58977 |
| 18 | 77215 |
| 19 | 99684 |
| 20 | 126994 |
| 21 | 159963 |
| 22 | 199443 |
| 23 | 246304 |
| 24 | 301702 |
| 25 | 366729 |
| 26 | 442587 |
| 27 | 530508 |
| 28 | 631820 |
| 29 | 748121 |
| 30 | 880941 |
| 31 | 1031930 |
| 32 | 1202984 |
| 33 | 1395927 |
| 34 | 1612655 |
| 35 | 1855676 |
| 36 | 2127122 |
| 37 | 2429577 |
[1,9,36,104,257,549,1058,1896,3199,5145,7926, 11768,16967,23859,32846,44378,58977,77215,99684, 126994,159963,199443,246304,301702,366729,442587, 530508,631820,748121,880941,1031930,1202984, 1395927,1612655,1855676,2127122,2429577] |