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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, 0)}.
A150668
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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =24a(4) =110a(5) =393a(6) =1851a(7) =7044a(8) =34068a(9) =136194a(10) =662522a(11) =2716549a(12) =13350021a(13) =56022703a(14) =275842656a(15) =1173650989a(16) =5807929765a(17) =25046792002a(18) =124043751231a(19) =539651966159
External references
- oeis: A150668