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), (-1, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
A149846
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), (-1, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =12a(4) =38a(5) =118a(6) =424a(7) =1544a(8) =5668a(9) =22186a(10) =86962a(11) =347260a(12) =1426428a(13) =5869950a(14) =24589692a(15) =104252754a(16) =444133962a(17) =1916625390a(18) =8318626668a(19) =36335194794a(20) =159998657938a(21) =707382646426
External references
- oeis: A149846