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A149070 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 42 |
| 5 | 175 |
| 6 | 755 |
| 7 | 3318 |
| 8 | 14897 |
| 9 | 67934 |
| 10 | 313320 |
| 11 | 1457186 |
| 12 | 6834042 |
| 13 | 32249951 |
| 14 | 152963363 |
| 15 | 728772478 |
| 16 | 3485974666 |
| 17 | 16728898237 |
| 18 | 80509755123 |
| 19 | 388466875840 |
| 20 | 1878628301984 |
| 21 | 9102952302638 |
| 22 | 44187666497748 |
| 23 | 214844863711924 |
| 24 | 1046105281413402 |
| 25 | 5100271714845970 |
| 26 | 24896244561277645 |
| 27 | 121660675201413859 |
[1,1,3,11,42,175,755,3318,14897,67934,313320, 1457186,6834042,32249951,152963363,728772478, 3485974666,16728898237,80509755123,388466875840, 1878628301984,9102952302638,44187666497748, 214844863711924,1046105281413402,5100271714845970, 24896244561277645,121660675201413859] |