Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UU, UD, HH and DU.
A329689
Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UU, UD, HH and DU.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =5a(9) =3a(10) =7a(11) =16a(12) =16a(13) =16a(14) =40a(15) =66a(16) =65a(17) =99a(18) =211a(19) =288a(20) =329a(21) =603a(22) =1079a(23) =1372a(24) =1897a(25) =3529a(26) =5538a(27) =7219a(28) =11431a(29) =20076
External references
- oeis: A329689