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, 1, -1), (1, 1, 1)}.
A150630
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, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =115a(5) =496a(6) =2203a(7) =9920a(8) =45411a(9) =209940a(10) =979623a(11) =4601579a(12) =21744703a(13) =103247146a(14) =492314131a(15) =2355900011a(16) =11309419723a(17) =54439264932a(18) =262687966031
External references
- oeis: A150630