The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 11 |
| 5 | 14 |
| 6 | 25 |
| 7 | 64 |
| 8 | 153 |
| 9 | 217 |
| 10 | 1455 |
| 11 | 6037 |
| 12 | 7492 |
| 13 | 58481 |
| 14 | 592302 |
| 15 | 650783 |
| 16 | 8401698 |
| 17 | 9052481 |
| 18 | 98926508 |
| 19 | 701538037 |
| 20 | 800464545 |
| 21 | 3903396217 |
| 22 | 24220841847 |
| 23 | 28124238064 |
| 24 | 80469317975 |
| 25 | 189062874014 |
| 26 | 269532191989 |
| 27 | 458595066003 |
| 28 | 1645317389998 |
| 29 | 2103912456001 |
[1,1,2,3,11,14,25,64,153,217,1455,6037,7492,58481, 592302,650783,8401698,9052481,98926508,701538037, 800464545,3903396217,24220841847,28124238064, 80469317975,189062874014,269532191989, 458595066003,1645317389998,2103912456001] |