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, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1), (1, 1, 1)}.
A151211
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, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =53a(4) =251a(5) =1123a(6) =5443a(7) =25319a(8) =124085a(9) =589525a(10) =2907101a(11) =13992377a(12) =69260281a(13) =336246069a(14) =1668515057a(15) =8149453349a(16) =40508704195a(17) =198730129755a(18) =989055732315
External references
- oeis: A151211