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, 0, 0), (-1, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148967
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, 0, 0), (-1, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =31a(5) =108a(6) =406a(7) =1553a(8) =6166a(9) =24855a(10) =102270a(11) =425738a(12) =1796144a(13) =7649640a(14) =32882918a(15) =142419505a(16) =621115219a(17) =2724948992a(18) =12019680168a(19) =53274256405a(20) =237154752119
External references
- oeis: A148967