Sum of the lengths of the second ascents in all Dyck paths of semilength n+2.
A114277
Sum of the lengths of the second ascents in all Dyck paths of semilength n+2.
Terms
- a(0) =1a(1) =5a(2) =19a(3) =67a(4) =232a(5) =804a(6) =2806a(7) =9878a(8) =35072a(9) =125512a(10) =452388a(11) =1641028a(12) =5986993a(13) =21954973a(14) =80884423a(15) =299233543a(16) =1111219333a(17) =4140813373a(18) =15478839553a(19) =58028869153a(20) =218123355523a(21) =821908275547
External references
- oeis: A114277