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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 51 |
| 4 | 358 |
| 5 | 3939 |
| 6 | 51208 |
| 7 | 870537 |
| 8 | 16540204 |
| 9 | 380424693 |
| 10 | 11032316098 |
| 11 | 342001799039 |
| 12 | 12654066564444 |
| 13 | 518816729142205 |
| 14 | 22309119353114816 |
| 15 | 1048528609596396353 |
| 16 | 55572016308609006710 |
| 17 | 3278748962207931395891 |
| 18 | 200003686694683815149352 |
| 19 | 13400247008543815615006585 |
[1,3,10,51,358,3939,51208,870537,16540204, 380424693,11032316098,342001799039,12654066564444, 518816729142205,22309119353114816, 1048528609596396353,55572016308609006710, 3278748962207931395891,200003686694683815149352, 13400247008543815615006585] |