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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1), (1, 0, 1)}.
A150855
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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =141a(5) =624a(6) =2867a(7) =13229a(8) =62119a(9) =292731a(10) =1392647a(11) =6644788a(12) =31885950a(13) =153374635a(14) =740486213a(15) =3582007538a(16) =17372069719a(17) =84385948890a(18) =410681164286
External references
- oeis: A150855