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, 0), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
A149269
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, 0), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =41a(5) =148a(6) =576a(7) =2276a(8) =9235a(9) =38109a(10) =159744a(11) =676538a(12) =2900033a(13) =12524567a(14) =54531416a(15) =238998571a(16) =1053340722a(17) =4667557784a(18) =20776709880a(19) =92863035709a(20) =416671461742
External references
- oeis: A149269