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, 1), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
A149752
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, 1), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =83a(5) =321a(6) =1583a(7) =6671a(8) =33059a(9) =146431a(10) =727601a(11) =3323551a(12) =16541701a(13) =77114047a(14) =384229445a(15) =1816940233a(16) =9060126539a(17) =43292907667a(18) =216000576783
External references
- oeis: A149752