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, 0), (0, 1, 1), (1, 0, 0)}.
A151068
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, 0), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =39a(4) =161a(5) =677a(6) =2928a(7) =12960a(8) =58017a(9) =262405a(10) =1199539a(11) =5525169a(12) =25596413a(13) =119257971a(14) =558421159a(15) =2625162125a(16) =12385172472a(17) =58627444543a(18) =278328330444
External references
- oeis: A151068