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, 1, 0), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
A150400
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, 1, 0), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =92a(5) =367a(6) =1532a(7) =6537a(8) =28401a(9) =125402a(10) =561269a(11) =2538592a(12) =11577377a(13) =53180725a(14) =245851609a(15) =1142923676a(16) =5338638677a(17) =25039506213a(18) =117875420742a(19) =556766876129
External references
- oeis: A150400