Number T(n,k) of modified skew Dyck paths of semilength n with exactly k anti-down steps; triangle T(n,k), n>=0, 0<=k<=n-floor((1+sqrt(max(0,8n-7)))/2), read by rows.
A274404
Number T(n,k) of modified skew Dyck paths of semilength n with exactly k anti-down steps; triangle T(n,k), n>=0, 0<=k<=n-floor((1+sqrt(max(0,8n-7)))/2), read by rows.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =1a(5) =14a(6) =6a(7) =42a(8) =28a(9) =3a(10) =132a(11) =120a(12) =28a(13) =1a(14) =429a(15) =495a(16) =180a(17) =20a(18) =1430a(19) =2002a(20) =990a(21) =195a(22) =10a(23) =4862a(24) =8008a(25) =5005a(26) =1430a(27) =165a(28) =4a(29) =16796
External references
- oeis: A274404