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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 2 |
| 3 | 7 |
| 4 | 25 |
| 5 | 72 |
| 6 | 52 |
| 7 | 141 |
| 8 | 510 |
| 9 | 1353 |
| 10 | 979 |
| 11 | 2576 |
| 12 | 9320 |
| 13 | 24447 |
| 14 | 17690 |
| 15 | 46347 |
| 16 | 167685 |
| 17 | 439128 |
| 18 | 317756 |
| 19 | 831985 |
| 20 | 3010150 |
| 21 | 7880997 |
| 22 | 5702743 |
| 23 | 14930208 |
| 24 | 54018000 |
| 25 | 141421803 |
| 26 | 102333778 |
| 27 | 267913919 |
| 28 | 969321665 |
| 29 | 2537719272 |
| 30 | 1836310916 |
| 31 | 4807525989 |
| 32 | 17393792430 |
| 33 | 45537545553 |
[0,3,2,7,25,72,52,141,510,1353,979,2576,9320, 24447,17690,46347,167685,439128,317756,831985, 3010150,7880997,5702743,14930208,54018000, 141421803,102333778,267913919,969321665, 2537719272,1836310916,4807525989,17393792430, 45537545553] |