Number of Dyck paths of semilength n such that all positive levels up to the highest level have a positive number of peaks and all the level peak numbers are distinct.
A287993
Number of Dyck paths of semilength n such that all positive levels up to the highest level have a positive number of peaks and all the level peak numbers are distinct.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =10a(6) =21a(7) =52a(8) =147a(9) =564a(10) =1651a(11) =4440a(12) =12499a(13) =36853a(14) =116476a(15) =390774a(16) =1352215a(17) =4593736a(18) =15057127a(19) =48419013a(20) =156073723a(21) =511324062a(22) =1713185811a(23) =5878350249a(24) =20574046540a(25) =72771206715a(26) =257475113013a(27) =905430711156
External references
- oeis: A287993