Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (-1, 1, -1), (1, -1, 1), (1, 0, 0)}.
A148036
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (-1, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =55a(7) =137a(8) =475a(9) =1281a(10) =4671a(11) =13561a(12) =51649a(13) =158164a(14) =619616a(15) =1970703a(16) =7889055a(17) =25897272a(18) =105597628a(19) =355925249a(20) =1472958168a(21) =5073075343a(22) =21248105272a(23) =74525835058a(24) =315355167249
External references
- oeis: A148036