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, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150280
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, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =90a(5) =361a(6) =1512a(7) =6467a(8) =27930a(9) =122212a(10) =540391a(11) =2404864a(12) =10769805a(13) =48506857a(14) =219402663a(15) =996212886a(16) =4539567631a(17) =20747068325a(18) =95069654864a(19) =436711353147
External references
- oeis: A150280