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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 7 |
| 5 | 8 |
| 6 | 12 |
| 7 | 31 |
| 8 | 71 |
| 9 | 125 |
| 10 | 201 |
| 11 | 367 |
| 12 | 749 |
| 13 | 1471 |
| 14 | 2679 |
| 15 | 4814 |
| 16 | 9014 |
| 17 | 17304 |
| 18 | 32739 |
| 19 | 60683 |
| 20 | 112444 |
| 21 | 210938 |
| 22 | 397800 |
| 23 | 746347 |
| 24 | 1392898 |
| 25 | 2601701 |
| 26 | 4876692 |
| 27 | 9149911 |
| 28 | 17138518 |
| 29 | 32060349 |
| 30 | 60002060 |
| 31 | 112404852 |
| 32 | 210600344 |
| 33 | 394370928 |
| 34 | 738281497 |
| 35 | 1382360598 |
[0,0,1,4,7,8,12,31,71,125,201,367,749,1471,2679, 4814,9014,17304,32739,60683,112444,210938,397800, 746347,1392898,2601701,4876692,9149911,17138518, 32060349,60002060,112404852,210600344,394370928, 738281497,1382360598] |