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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 6 |
| 6 | 13 |
| 7 | 57 |
| 8 | 169 |
| 9 | 673 |
| 10 | 2301 |
| 11 | 8933 |
| 12 | 32747 |
| 13 | 127063 |
| 14 | 483484 |
| 15 | 1889957 |
| 16 | 7352241 |
| 17 | 29003446 |
| 18 | 114481435 |
| 19 | 455542880 |
| 20 | 1816976042 |
| 21 | 7285391071 |
| 22 | 29291855748 |
| 23 | 118218771203 |
| 24 | 478372112363 |
| 25 | 1941436590561 |
| 26 | 7897802784418 |
| 27 | 32205683248225 |
| 28 | 131602039333873 |
[1,1,0,1,1,6,13,57,169,673,2301,8933,32747,127063, 483484,1889957,7352241,29003446,114481435, 455542880,1816976042,7285391071,29291855748, 118218771203,478372112363,1941436590561, 7897802784418,32205683248225,131602039333873] |