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), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
A149722
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), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =73a(5) =305a(6) =1391a(7) =5991a(8) =28401a(9) =127783a(10) =604637a(11) =2803365a(12) =13421697a(13) =62720101a(14) =303408339a(15) =1435465215a(16) =6948166985a(17) =33216448203a(18) =161497181509a(19) =774941923801
External references
- oeis: A149722