Number of (1,1)-steps in all Delannoy paths of length n.
A108666
Number of (1,1)-steps in all Delannoy paths of length n.
Terms
- a(0) =0a(1) =1a(2) =8a(3) =57a(4) =384a(5) =2505a(6) =16008a(7) =100849a(8) =628736a(9) =3888657a(10) =23900040a(11) =146146473a(12) =889928064a(13) =5399971161a(14) =32668236552a(15) =197123362785
External references
- oeis: A108666