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, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150415
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, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =95a(5) =376a(6) =1606a(7) =6804a(8) =30037a(9) =131992a(10) =597369a(11) =2692137a(12) =12376944a(13) =56698785a(14) =263708533a(15) =1223267111a(16) =5740642063a(17) =26878561661a(18) =126998858753a(19) =599009884225
External references
- oeis: A150415