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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 | 2 |
| 2 | 5 |
| 3 | 13 |
| 4 | 38 |
| 5 | 124 |
| 6 | 424 |
| 7 | 1476 |
| 8 | 5196 |
| 9 | 18925 |
| 10 | 70739 |
| 11 | 268198 |
| 12 | 1021458 |
| 13 | 3934866 |
| 14 | 15386445 |
| 15 | 60817590 |
| 16 | 241493597 |
| 17 | 963318241 |
| 18 | 3874403554 |
| 19 | 15708096480 |
| 20 | 63979516337 |
| 21 | 261305467446 |
| 22 | 1071976962325 |
| 23 | 4422643793057 |
| 24 | 18324387536241 |
| 25 | 76103216963727 |
| 26 | 316881010419051 |
| 27 | 1324459171412129 |
| 28 | 5556007355104909 |
[1,2,5,13,38,124,424,1476,5196,18925,70739,268198, 1021458,3934866,15386445,60817590,241493597, 963318241,3874403554,15708096480,63979516337, 261305467446,1071976962325,4422643793057, 18324387536241,76103216963727,316881010419051, 1324459171412129,5556007355104909] |