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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 7 |
| 7 | 10 |
| 8 | 15 |
| 9 | 21 |
| 10 | 30 |
| 11 | 41 |
| 12 | 56 |
| 13 | 74 |
| 14 | 101 |
| 15 | 134 |
| 16 | 177 |
| 17 | 228 |
| 18 | 297 |
| 19 | 382 |
| 20 | 493 |
| 21 | 626 |
| 22 | 794 |
| 23 | 999 |
| 24 | 1260 |
| 25 | 1575 |
| 26 | 1967 |
| 27 | 2439 |
| 28 | 3022 |
| 29 | 3724 |
| 30 | 4587 |
| 31 | 5618 |
| 32 | 6874 |
| 33 | 8374 |
| 34 | 10189 |
| 35 | 12351 |
| 36 | 14953 |
| 37 | 18041 |
| 38 | 21740 |
| 39 | 26116 |
| 40 | 31329 |
| 41 | 37483 |
| 42 | 44793 |
| 43 | 53392 |
| 44 | 63555 |
| 45 | 75482 |
| 46 | 75482 |
| 47 | 89537 |
| 48 | 105998 |
| 49 | 125326 |
| 50 | 147885 |
| 51 | 174295 |
| 52 | 205071 |
| 53 | 241000 |
| 54 | 282758 |
[0,1,2,3,4,7,10,15,21,30,41,56,74,101,134,177,228, 297,382,493,626,794,999,1260,1575,1967,2439,3022, 3724,4587,5618,6874,8374,10189,12351,14953,18041, 21740,26116,31329,37483,44793,53392,63555,75482, 75482,89537,105998,125326,147885,174295,205071, 241000,282758] |