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, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
A150836
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, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =137a(5) =603a(6) =2727a(7) =12530a(8) =58210a(9) =272908a(10) =1288904a(11) =6123042a(12) =29227452a(13) =140068775a(14) =673525656a(15) =3248075350a(16) =15703248039a(17) =76085099839a(18) =369354176568
External references
- oeis: A150836