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, 1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
A150584
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, 1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =110a(5) =469a(6) =2110a(7) =9539a(8) =44207a(9) =205708a(10) =969920a(11) =4588869a(12) =21880774a(13) =104624543a(14) =502768044a(15) =2421529307a(16) =11702566048a(17) =56660506153a(18) =274998864288
External references
- oeis: A150584