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, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148434
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, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =19a(5) =64a(6) =257a(7) =941a(8) =3968a(9) =15839a(10) =69664a(11) =290521a(12) =1300855a(13) =5596851a(14) =25518160a(15) =112525866a(16) =519180302a(17) =2328488717a(18) =10843870533a(19) =49326788502a(20) =231519411263
External references
- oeis: A148434