The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1024 |
| 2 | 48620 |
| 3 | 485714 |
| 4 | 2575955 |
| 5 | 9779558 |
| 6 | 30643468 |
| 7 | 85350934 |
| 8 | 220335341 |
| 9 | 539722230 |
| 10 | 1270939682 |
| 11 | 2897487924 |
| 12 | 6419463692 |
| 13 | 13849588776 |
| 14 | 29130616029 |
| 15 | 59785815715 |
| 16 | 119811736276 |
| 17 | 234625138625 |
| 18 | 449330010578 |
| 19 | 842238087946 |
| 20 | 1546539992378 |
[1024,48620,485714,2575955,9779558,30643468, 85350934,220335341,539722230,1270939682, 2897487924,6419463692,13849588776,29130616029, 59785815715,119811736276,234625138625, 449330010578,842238087946,1546539992378] |