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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 | 6 |
| 2 | 24 |
| 3 | 78 |
| 4 | 222 |
| 5 | 570 |
| 6 | 1356 |
| 7 | 3030 |
| 8 | 6432 |
| 9 | 13074 |
| 10 | 25608 |
| 11 | 48558 |
| 12 | 89502 |
| 13 | 160854 |
| 14 | 282624 |
| 15 | 486534 |
| 16 | 822174 |
| 17 | 1365978 |
| 18 | 2234400 |
| 19 | 3602742 |
| 20 | 5732202 |
| 21 | 9008034 |
| 22 | 13993320 |
| 23 | 21503730 |
| 24 | 32711460 |
| 25 | 49287750 |
| 26 | 73598280 |
| 27 | 108968334 |
| 28 | 160041750 |
| 29 | 233262786 |
[1,6,24,78,222,570,1356,3030,6432,13074,25608, 48558,89502,160854,282624,486534,822174,1365978, 2234400,3602742,5732202,9008034,13993320,21503730, 32711460,49287750,73598280,108968334,160041750, 233262786] |