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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
A150101
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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =68a(5) =253a(6) =982a(7) =3904a(8) =15904a(9) =65870a(10) =276702a(11) =1176029a(12) =5049443a(13) =21864431a(14) =95369300a(15) =418700058a(16) =1848734071a(17) =8204001286a(18) =36570660638a(19) =163685587764a(20) =735324507172
External references
- oeis: A150101