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, -1, -1), (1, -1, 0), (1, 1, 0)}.
A149125
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, -1, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =103a(6) =385a(7) =1315a(8) =5064a(9) =18333a(10) =72135a(11) =271673a(12) =1085490a(13) =4201685a(14) =16998626a(15) =67093063a(16) =274107736a(17) =1098361379a(18) =4522963271a(19) =18339291269a(20) =76016200380a(21) =311165747469
External references
- oeis: A149125