Number of Delannoy paths of length n with no (1,1)-steps on the line y=x.
A109980
Number of Delannoy paths of length n with no (1,1)-steps on the line y=x.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =36a(4) =172a(5) =852a(6) =4324a(7) =22332a(8) =116876a(9) =618084a(10) =3296308a(11) =17702412a(12) =95627580a(13) =519170004a(14) =2830862532a(15) =15494401116a(16) =85091200620a(17) =468692890308
External references
- oeis: A109980