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, 0), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
A150620
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, 0), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =113a(5) =488a(6) =2159a(7) =9712a(8) =44427a(9) =205332a(10) =957805a(11) =4499279a(12) =21259719a(13) =100950898a(14) =481399099a(15) =2303895303a(16) =11060992583a(17) =53249968420a(18) =256980006481
External references
- oeis: A150620