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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 14 |
| 5 | 27 |
| 6 | 73 |
| 7 | 151 |
| 8 | 400 |
| 9 | 862 |
| 10 | 2254 |
| 11 | 4989 |
| 12 | 12932 |
| 13 | 29165 |
| 14 | 75135 |
| 15 | 171805 |
| 16 | 440620 |
| 17 | 1018240 |
| 18 | 2602600 |
| 19 | 6064810 |
| 20 | 15460920 |
| 21 | 36272270 |
| 22 | 92276210 |
| 23 | 217693425 |
| 24 | 552878074 |
| 25 | 1310422012 |
| 26 | 3323477928 |
| 27 | 7908572351 |
| 28 | 20034349880 |
| 29 | 47837048643 |
| 30 | 121063495921 |
| 31 | 289930092391 |
| 32 | 733118166228 |
| 33 | 1760303403020 |
[1,1,3,5,14,27,73,151,400,862,2254,4989,12932, 29165,75135,171805,440620,1018240,2602600,6064810, 15460920,36272270,92276210,217693425,552878074, 1310422012,3323477928,7908572351,20034349880, 47837048643,121063495921,289930092391, 733118166228,1760303403020] |