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, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
A150711
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, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =27a(4) =122a(5) =491a(6) =2307a(7) =10018a(8) =48090a(9) =217772a(10) =1058048a(11) =4917256a(12) =24072412a(13) =113814946a(14) =560021422a(15) =2679737850a(16) =13232592446a(17) =63871995263a(18) =316217434327
External references
- oeis: A150711