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) |
|---|---|
| 1 | 4 |
| 2 | 14 |
| 3 | 28 |
| 4 | 75 |
| 5 | 250 |
| 6 | 706 |
| 7 | 2116 |
| 8 | 6399 |
| 9 | 19179 |
| 10 | 57552 |
| 11 | 173123 |
| 12 | 520515 |
| 13 | 1564516 |
| 14 | 4704272 |
| 15 | 14144805 |
| 16 | 42529166 |
| 17 | 127877045 |
| 18 | 384503591 |
| 19 | 1156133200 |
| 20 | 3476296651 |
| 21 | 10452650138 |
| 22 | 31429406405 |
| 23 | 94503128515 |
| 24 | 284155666181 |
| 25 | 854410380210 |
| 26 | 2569074895741 |
[4,14,28,75,250,706,2116,6399,19179,57552,173123, 520515,1564516,4704272,14144805,42529166, 127877045,384503591,1156133200,3476296651, 10452650138,31429406405,94503128515,284155666181, 854410380210,2569074895741] |