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), (-1, -1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150273
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), (-1, -1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =92a(5) =364a(6) =1598a(7) =6824a(8) =30404a(9) =136764a(10) =617446a(11) =2831276a(12) =13031622a(13) =60346428a(14) =281845432a(15) =1316928654a(16) =6197429960a(17) =29231903134a(18) =138286736940a(19) =656927696126
External references
- oeis: A150273