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, -1), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
A149513
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, -1), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =47a(5) =155a(6) =601a(7) =2255a(8) =8981a(9) =34599a(10) =141187a(11) =561435a(12) =2304911a(13) =9360735a(14) =38838245a(15) =159466743a(16) =667227123a(17) =2769683191a(18) =11647989101a(19) =48731215829a(20) =206061404939a(21) =867147480815
External references
- oeis: A149513