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, 0, 1), (0, 0, 1), (1, -1, -1), (1, 1, 0)}.
A150190
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, 0, 1), (0, 0, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =78a(5) =302a(6) =1229a(7) =5080a(8) =21463a(9) =92119a(10) =399231a(11) =1749148a(12) =7722728a(13) =34318206a(14) =153446902a(15) =689417576a(16) =3111064995a(17) =14094596300a(18) =64068297724a(19) =292131774074
External references
- oeis: A150190