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, -1), (-1, 0), (-1, 1), (0, -1), (1, 0), (1, 1)}.
A151467
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, -1), (-1, 0), (-1, 1), (0, -1), (1, 0), (1, 1)}.
Terms
- a(0) =1a(1) =0a(2) =5a(3) =5a(4) =60a(5) =143a(6) =1026a(7) =3666a(8) =21645a(9) =94376a(10) =518078a(11) =2496709a(12) =13395620a(13) =68061470a(14) =364081314a(15) =1906396512a(16) =10243047235a(17) =54647381651a(18) =295593657670
External references
- oeis: A151467