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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 21 |
| 5 | 55 |
| 6 | 153 |
| 7 | 368 |
| 8 | 856 |
| 9 | 1424 |
| 10 | 2603 |
| 11 | 4967 |
| 12 | 8194 |
| 13 | 13663 |
| 14 | 22432 |
| 15 | 28169 |
| 16 | 47688 |
| 17 | 65545 |
| 18 | 96615 |
| 19 | 146248 |
| 20 | 202507 |
| 21 | 266267 |
| 22 | 364834 |
| 23 | 450308 |
| 24 | 585328 |
| 25 | 773000 |
| 26 | 986339 |
| 27 | 1162748 |
| 28 | 1472659 |
| 29 | 1993180 |
| 30 | 2275962 |
| 31 | 3012656 |
| 32 | 3552307 |
| 33 | 4590959 |
| 34 | 5404183 |
| 35 | 6601787 |
| 36 | 7893270 |
| 37 | 9340877 |
[0,1,5,21,55,153,368,856,1424,2603,4967,8194, 13663,22432,28169,47688,65545,96615,146248,202507, 266267,364834,450308,585328,773000,986339,1162748, 1472659,1993180,2275962,3012656,3552307,4590959, 5404183,6601787,7893270,9340877] |