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, 0), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, -1)}.
A150049
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, 0), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =61a(5) =214a(6) =793a(7) =2992a(8) =11603a(9) =45748a(10) =183769a(11) =746990a(12) =3071538a(13) =12748293a(14) =53393963a(15) =225310723a(16) =957057631a(17) =4089170129a(18) =17567378065a(19) =75844457539a(20) =328890705035
External references
- oeis: A150049