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), (0, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
A151228
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), (0, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =58a(4) =275a(5) =1301a(6) =6326a(7) =30693a(8) =150617a(9) =739484a(10) =3649152a(11) =18021798a(12) =89258150a(13) =442338523a(14) =2195951351a(15) =10907181445a(16) =54234272375a(17) =269792089940
External references
- oeis: A151228