The OEIS is supported by the many generous donors to the OEIS Foundation.
A223160 as a simple table
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 10 |
| 3 | 40 |
| 4 | 139 |
| 5 | 568 |
| 6 | 2134 |
| 7 | 8724 |
| 8 | 33639 |
| 9 | 136904 |
| 10 | 534276 |
| 11 | 2166472 |
| 12 | 8510509 |
| 13 | 34420568 |
| 14 | 135769884 |
| 15 | 548080716 |
| 16 | 2167856618 |
| 17 | 8738893896 |
| 18 | 34633415528 |
| 19 | 139459394648 |
| 20 | 553500106331 |
| 21 | 2226881681120 |
| 22 | 8848085247670 |
| 23 | 35573691960864 |
| 24 | 141468339347027 |
[4,10,40,139,568,2134,8724,33639,136904,534276, 2166472,8510509,34420568,135769884,548080716, 2167856618,8738893896,34633415528,139459394648, 553500106331,2226881681120,8848085247670, 35573691960864,141468339347027] |