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, 0, 0), (1, 0, 1)}.
A150111
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, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =70a(5) =262a(6) =1023a(7) =4094a(8) =16818a(9) =69945a(10) =294922a(11) =1259081a(12) =5426730a(13) =23561608a(14) =103046709a(15) =453659247a(16) =2007599774a(17) =8925829461a(18) =39864238925a(19) =178747571197a(20) =804199297973
External references
- oeis: A150111