Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UH, HU, HD and DH.
A329696
Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UH, HU, HD and DH.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =1a(6) =6a(7) =1a(8) =15a(9) =1a(10) =43a(11) =1a(12) =133a(13) =1a(14) =430a(15) =1a(16) =1431a(17) =1a(18) =4863a(19) =1a(20) =16797a(21) =1a(22) =58787a(23) =1a(24) =208013a(25) =1a(26) =742901a(27) =1a(28) =2674441a(29) =1
External references
- oeis: A329696