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, 0), (1, 0, -1), (1, 1, 0)}.
A149179
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, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =36a(5) =118a(6) =452a(7) =1616a(8) =6452a(9) =24568a(10) =100709a(11) =398422a(12) =1666159a(13) =6782906a(14) =28786448a(15) =119623684a(16) =513732828a(17) =2169837355a(18) =9406969512a(19) =40239469006a(20) =175836286213a(21) =760059422197
External references
- oeis: A149179