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, 1, 0), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150768
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, 1, 0), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =128a(5) =546a(6) =2414a(7) =10856a(8) =49400a(9) =226878a(10) =1053341a(11) =4911942a(12) =23065184a(13) =108766594a(14) =515154967a(15) =2448386241a(16) =11672043990a(17) =55807469114a(18) =267451716801
External references
- oeis: A150768