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, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150114
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, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =70a(5) =263a(6) =1039a(7) =4201a(8) =17360a(9) =72965a(10) =310840a(11) =1338571a(12) =5820669a(13) =25504666a(14) =112537658a(15) =499493326a(16) =2228445752a(17) =9988153191a(18) =44949498534a(19) =203026168336a(20) =920042020632
External references
- oeis: A150114