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A052534 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 9 |
| 4 | 20 |
| 5 | 45 |
| 6 | 101 |
| 7 | 227 |
| 8 | 510 |
| 9 | 1146 |
| 10 | 2575 |
| 11 | 5786 |
| 12 | 13001 |
| 13 | 29213 |
| 14 | 65641 |
| 15 | 147494 |
| 16 | 331416 |
| 17 | 744685 |
| 18 | 1673292 |
| 19 | 3759853 |
| 20 | 8448313 |
| 21 | 18983187 |
| 22 | 42654834 |
| 23 | 95844542 |
| 24 | 215360731 |
| 25 | 483911170 |
| 26 | 1087338529 |
| 27 | 2443227497 |
| 28 | 5489882353 |
| 29 | 12335653674 |
[1,2,4,9,20,45,101,227,510,1146,2575,5786,13001, 29213,65641,147494,331416,744685,1673292,3759853, 8448313,18983187,42654834,95844542,215360731, 483911170,1087338529,2443227497,5489882353, 12335653674] |