Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1), (1, 0)}.
A151483
Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1), (1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =48a(5) =192a(6) =832a(7) =3712a(8) =17152a(9) =81152a(10) =392192a(11) =1928192a(12) =9621504a(13) =48623616a(14) =248463360a(15) =1282031616a(16) =6672285696a(17) =34993274880a(18) =184793432064a(19) =981947645952
External references
- oeis: A151483