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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 15 |
| 6 | 30 |
| 7 | 54 |
| 8 | 95 |
| 9 | 159 |
| 10 | 257 |
| 11 | 400 |
| 12 | 613 |
| 13 | 919 |
| 14 | 1352 |
| 15 | 1970 |
| 16 | 2830 |
| 17 | 4017 |
| 18 | 5654 |
| 19 | 7877 |
| 20 | 10886 |
| 21 | 14941 |
| 22 | 20352 |
| 23 | 27541 |
| 24 | 37071 |
| 25 | 49613 |
| 26 | 66026 |
| 27 | 87464 |
| 28 | 115285 |
| 29 | 151285 |
| 30 | 197728 |
| 31 | 257356 |
| 32 | 333673 |
| 33 | 431067 |
| 34 | 554907 |
| 35 | 711948 |
| 36 | 910530 |
| 37 | 1160846 |
| 38 | 1475512 |
| 39 | 1870199 |
| 40 | 2363847 |
[1,1,2,4,7,15,30,54,95,159,257,400,613,919,1352, 1970,2830,4017,5654,7877,10886,14941,20352,27541, 37071,49613,66026,87464,115285,151285,197728, 257356,333673,431067,554907,711948,910530,1160846, 1475512,1870199,2363847] |