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), (0, 0, -1), (1, 0, 1), (1, 1, 0)}.
A150777
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), (0, 0, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =130a(5) =564a(6) =2557a(7) =11683a(8) =54346a(9) =254545a(10) =1203147a(11) =5716624a(12) =27310772a(13) =130979508a(14) =630438224a(15) =3043186518a(16) =14727732882a(17) =71430873409a(18) =347119061240
External references
- oeis: A150777