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 | 13 |
| 3 | 33 |
| 4 | 81 |
| 5 | 202 |
| 6 | 492 |
| 7 | 1143 |
| 8 | 2524 |
| 9 | 5315 |
| 10 | 10718 |
| 11 | 20776 |
| 12 | 38839 |
| 13 | 70225 |
| 14 | 123134 |
| 15 | 209884 |
| 16 | 348550 |
| 17 | 565100 |
| 18 | 896136 |
| 19 | 1392363 |
| 20 | 2122925 |
| 21 | 3180764 |
| 22 | 4689176 |
| 23 | 6809757 |
| 24 | 9751952 |
| 25 | 13784441 |
| 26 | 19248618 |
| 27 | 26574442 |
| 28 | 36298963 |
| 29 | 49087851 |
| 30 | 65760282 |
| 31 | 87317562 |
[4,13,33,81,202,492,1143,2524,5315,10718,20776, 38839,70225,123134,209884,348550,565100,896136, 1392363,2122925,3180764,4689176,6809757,9751952, 13784441,19248618,26574442,36298963,49087851, 65760282,87317562] |