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, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150647
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, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =117a(5) =509a(6) =2279a(7) =10366a(8) =47724a(9) =222280a(10) =1043551a(11) =4929582a(12) =23413629a(13) =111722678a(14) =535090212a(15) =2570945247a(16) =12388203875a(17) =59841383394a(18) =289679576866
External references
- oeis: A150647