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, 0, 1), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
A150780
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, 0, 1), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =133a(5) =566a(6) =2617a(7) =11763a(8) =55530a(9) =256938a(10) =1227867a(11) =5781928a(12) =27850891a(13) =132672582a(14) =642602461a(15) =3085978055a(16) =15007566746a(17) =72497656217a(18) =353657229891
External references
- oeis: A150780