Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals two.
A288541
Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals two.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =3a(4) =13a(5) =30a(6) =61a(7) =172a(8) =619a(9) =2241a(10) =7736a(11) =25786a(12) =85315a(13) =286653a(14) =986444a(15) =3465777a(16) =12342188a(17) =44275218a(18) =159463056a(19) =576136367a(20) =2089063623a(21) =7607265038a(22) =27829092314a(23) =102263653872a(24) =377340952123
External references
- oeis: A288541