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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 2 |
| 8 | 0 |
| 9 | 2 |
| 10 | 0 |
| 11 | 2 |
| 12 | 2 |
| 13 | 4 |
| 14 | 4 |
| 15 | 6 |
| 16 | 5 |
| 17 | 7 |
| 18 | 8 |
| 19 | 14 |
| 20 | 14 |
| 21 | 19 |
| 22 | 22 |
| 23 | 30 |
| 24 | 36 |
| 25 | 48 |
| 26 | 60 |
| 27 | 79 |
| 28 | 94 |
| 29 | 118 |
| 30 | 154 |
| 31 | 194 |
| 32 | 248 |
| 33 | 315 |
| 34 | 390 |
| 35 | 486 |
| 36 | 623 |
| 37 | 792 |
| 38 | 1008 |
| 39 | 1261 |
| 40 | 1579 |
| 41 | 2007 |
| 42 | 2555 |
| 43 | 3219 |
| 44 | 4043 |
| 45 | 5109 |
| 46 | 6464 |
| 47 | 8204 |
| 48 | 10351 |
| 49 | 13100 |
| 50 | 16575 |
| 51 | 20889 |
| 52 | 26398 |
| 53 | 33388 |
| 54 | 42155 |
| 55 | 53370 |
| 56 | 67414 |
[1,0,0,0,0,1,0,2,0,2,0,2,2,4,4,6,5,7,8,14,14,19, 22,30,36,48,60,79,94,118,154,194,248,315,390,486, 623,792,1008,1261,1579,2007,2555,3219,4043,5109, 6464,8204,10351,13100,16575,20889,26398,33388, 42155,53370,67414] |