|
| |
|
|
A000781
|
|
3*Catalan(n)-Catalan(n-1)-1.
|
|
0
| |
|
|
1, 4, 12, 36, 111, 353, 1154, 3860, 13155, 45525, 159561, 565249, 2020687, 7280419, 26410094, 96378164, 353576699, 1303271309, 4824150869, 17925098069, 66834680639, 249981423899, 937696277309, 3526652828321, 13295935057031, 50240112815003
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
