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, 0, -1), (0, -1, 0), (1, -1, 0), (1, 1, 1)}.
A149534
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, 0, -1), (0, -1, 0), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =49a(5) =177a(6) =667a(7) =2511a(8) =10009a(9) =39187a(10) =155965a(11) =634409a(12) =2572311a(13) =10467813a(14) =43375789a(15) =178967139a(16) =740636461a(17) =3103154817a(18) =12965474087a(19) =54264996479a(20) =229254996155a(21) =966417702403
External references
- oeis: A149534