Number of meanders (walks starting at the origin and ending at any altitude >= 0 that may touch but never go below the x-axis) with n steps from {-3,-2,-1,1,2,3}.
A278398
Number of meanders (walks starting at the origin and ending at any altitude >= 0 that may touch but never go below the x-axis) with n steps from {-3,-2,-1,1,2,3}.
Terms
- a(0) =1a(1) =3a(2) =15a(3) =75a(4) =400a(5) =2169a(6) =11989a(7) =66985a(8) =377718a(9) =2144290a(10) =12240943a(11) =70193305a(12) =404029950a(13) =2332989921a(14) =13508237399a(15) =78399357623a(16) =455959701700
External references
- oeis: A278398