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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 15 |
| 6 | 29 |
| 7 | 53 |
| 8 | 94 |
| 9 | 160 |
| 10 | 265 |
| 11 | 430 |
| 12 | 683 |
| 13 | 1066 |
| 14 | 1640 |
| 15 | 2487 |
| 16 | 3725 |
| 17 | 5519 |
| 18 | 8092 |
| 19 | 11752 |
| 20 | 16922 |
| 21 | 24167 |
| 22 | 34254 |
| 23 | 48213 |
| 24 | 67409 |
| 25 | 93661 |
| 26 | 129378 |
| 27 | 177720 |
| 28 | 242841 |
| 29 | 330172 |
| 30 | 446772 |
| 31 | 601810 |
| 32 | 807153 |
| 33 | 1078081 |
| 34 | 1434250 |
| 35 | 1900860 |
| 36 | 2510097 |
| 37 | 3303003 |
| 38 | 4331767 |
| 39 | 5662539 |
[0,0,1,3,7,15,29,53,94,160,265,430,683,1066,1640, 2487,3725,5519,8092,11752,16922,24167,34254,48213, 67409,93661,129378,177720,242841,330172,446772, 601810,807153,1078081,1434250,1900860,2510097, 3303003,4331767,5662539] |