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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 1 |
| 27 | 3 |
| 28 | 7 |
| 29 | 17 |
| 30 | 35 |
| 31 | 70 |
| 32 | 140 |
| 33 | 264 |
| 34 | 486 |
| 35 | 887 |
| 36 | 1583 |
| 37 | 2794 |
| 38 | 4880 |
| 39 | 8447 |
| 40 | 14494 |
| 41 | 24777 |
| 42 | 42098 |
| 43 | 71381 |
| 44 | 120793 |
| 45 | 204521 |
| 46 | 346712 |
| 47 | 590446 |
| 48 | 1011336 |
| 49 | 1748606 |
| 50 | 3059265 |
| 51 | 5435769 |
| 52 | 9835083 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,3,7,17,35,70,140,264,486,887,1583,2794,4880, 8447,14494,24777,42098,71381,120793,204521,346712, 590446,1011336,1748606,3059265,5435769,9835083] |