The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 30 |
| 4 | 281 |
| 5 | 3400 |
| 6 | 50557 |
| 7 | 890120 |
| 8 | 18101617 |
| 9 | 417464064 |
| 10 | 10764826421 |
| 11 | 306893014912 |
| 12 | 9584448407305 |
| 13 | 325407839778944 |
| 14 | 11933432488693549 |
| 15 | 470087171351873280 |
| 16 | 19796492491889197025 |
| 17 | 887518214183286390784 |
| 18 | 42202928616264032249701 |
| 19 | 2121583256369642798845952 |
[1,1,5,30,281,3400,50557,890120,18101617, 417464064,10764826421,306893014912,9584448407305, 325407839778944,11933432488693549, 470087171351873280,19796492491889197025, 887518214183286390784,42202928616264032249701, 2121583256369642798845952] |