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| n | a(n) |
|---|---|
| 1 | 888 |
| 2 | 4737 |
| 3 | 20290 |
| 4 | 72777 |
| 5 | 230014 |
| 6 | 656441 |
| 7 | 1728140 |
| 8 | 4246268 |
| 9 | 9847415 |
| 10 | 21700159 |
| 11 | 45744109 |
| 12 | 92663818 |
| 13 | 181178545 |
| 14 | 343044939 |
| 15 | 630954514 |
| 16 | 1130114352 |
| 17 | 1975727787 |
| 18 | 3377874220 |
| 19 | 5657695118 |
| 20 | 9297612083 |
| 21 | 15012132902 |
| 22 | 23843994305 |
| 23 | 37296211132 |
[888,4737,20290,72777,230014,656441,1728140, 4246268,9847415,21700159,45744109,92663818, 181178545,343044939,630954514,1130114352, 1975727787,3377874220,5657695118,9297612083, 15012132902,23843994305,37296211132] |