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), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
A150328
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), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =22a(4) =87a(5) =323a(6) =1370a(7) =5539a(8) =24459a(9) =103964a(10) =470998a(11) =2068727a(12) =9539561a(13) =42876377a(14) =200280183a(15) =915568425a(16) =4318502566a(17) =19998346530a(18) =95042265552a(19) =444597529434
External references
- oeis: A150328