Number of n-step paths from (0,0) to (1,0) where all diagonal, vertical and horizontal steps are allowed.
A218274
Number of n-step paths from (0,0) to (1,0) where all diagonal, vertical and horizontal steps are allowed.
Terms
- a(0) =0a(1) =1a(2) =4a(3) =27a(4) =168a(5) =1140a(6) =7800a(7) =54845a(8) =390320a(9) =2815344a(10) =20494320a(11) =150442908a(12) =1111782672a(13) =8264558016a(14) =61743361680a(15) =463306724595
External references
- oeis: A218274