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, -1), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
A148272
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, -1), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =15a(5) =39a(6) =151a(7) =433a(8) =1737a(9) =5364a(10) =22286a(11) =72471a(12) =307379a(13) =1035102a(14) =4443074a(15) =15382530a(16) =66756535a(17) =236379784a(18) =1034933583a(19) =3731202187a(20) =16442311519a(21) =60176605412a(22) =266663158823a(23) =988613764004
External references
- oeis: A148272