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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 23 |
| 3 | 154 |
| 4 | 647 |
| 5 | 1876 |
| 6 | 4802 |
| 7 | 9948 |
| 8 | 19975 |
| 9 | 34903 |
| 10 | 60648 |
| 11 | 94502 |
| 12 | 151298 |
| 13 | 217504 |
| 14 | 324844 |
| 15 | 446404 |
| 16 | 633351 |
| 17 | 830298 |
| 18 | 1144229 |
| 19 | 1447250 |
| 20 | 1931272 |
| 21 | 2396352 |
| 22 | 3105246 |
| 23 | 3759604 |
| 24 | 4821250 |
| 25 | 5705001 |
| 26 | 7155652 |
| 27 | 8413300 |
| 28 | 10373996 |
| 29 | 11975000 |
| 30 | 14696052 |
[1,23,154,647,1876,4802,9948,19975,34903,60648, 94502,151298,217504,324844,446404,633351,830298, 1144229,1447250,1931272,2396352,3105246,3759604, 4821250,5705001,7155652,8413300,10373996,11975000, 14696052] |