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, -1), (-1, -1, 1), (-1, 1, 0), (1, 0, 0), (1, 1, 1)}.
A150681
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, -1), (-1, -1, 1), (-1, 1, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =114a(5) =421a(6) =1942a(7) =7636a(8) =36085a(9) =147350a(10) =705918a(11) =2955504a(12) =14287308a(13) =60890684a(14) =296162054a(15) =1279163091a(16) =6248661396a(17) =27271297636a(18) =133652855104a(19) =588213884991
External references
- oeis: A150681