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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 22 |
| 2 | 310 |
| 3 | 2583 |
| 4 | 13809 |
| 5 | 54186 |
| 6 | 171002 |
| 7 | 460055 |
| 8 | 1096313 |
| 9 | 2375494 |
| 10 | 4768246 |
| 11 | 8988607 |
| 12 | 16078425 |
| 13 | 27509418 |
| 14 | 45304554 |
| 15 | 72180431 |
| 16 | 111712337 |
| 17 | 168523670 |
| 18 | 248501398 |
| 19 | 359039239 |
| 20 | 509310241 |
| 21 | 710570442 |
| 22 | 976495290 |
| 23 | 1323550503 |
[1,22,310,2583,13809,54186,171002,460055,1096313, 2375494,4768246,8988607,16078425,27509418, 45304554,72180431,111712337,168523670,248501398, 359039239,509310241,710570442,976495290, 1323550503] |