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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 28 |
| 3 | 64 |
| 4 | 168 |
| 5 | 440 |
| 6 | 1186 |
| 7 | 3230 |
| 8 | 8896 |
| 9 | 24688 |
| 10 | 68958 |
| 11 | 193610 |
| 12 | 545958 |
| 13 | 1545190 |
| 14 | 4387012 |
| 15 | 12489224 |
| 16 | 35639536 |
| 17 | 101914160 |
| 18 | 291970654 |
| 19 | 837834650 |
| 20 | 2407780858 |
| 21 | 6928681418 |
| 22 | 19961961014 |
| 23 | 57573920446 |
| 24 | 166216938550 |
| 25 | 480300958390 |
[1,10,28,64,168,440,1186,3230,8896,24688,68958, 193610,545958,1545190,4387012,12489224,35639536, 101914160,291970654,837834650,2407780858, 6928681418,19961961014,57573920446,166216938550, 480300958390] |