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, -1, 1), (1, 1, 0)}.
A149218
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, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =42a(5) =145a(6) =602a(7) =2388a(8) =10042a(9) =42498a(10) =183049a(11) =799499a(12) =3524763a(13) =15688373a(14) =70431199a(15) =317977943a(16) =1446357299a(17) =6607070514a(18) =30349207627a(19) =139970939560a(20) =648077550792
External references
- oeis: A149218