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), (-1, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150786
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), (-1, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =136a(5) =570a(6) =2666a(7) =11810a(8) =56202a(9) =256598a(10) =1232487a(11) =5735225a(12) =27726387a(13) =130699845a(14) =634668095a(15) =3019779028a(16) =14713965181a(17) =70500519263a(18) =344415946439
External references
- oeis: A150786