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), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
A149303
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), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =46a(5) =174a(6) =740a(7) =3109a(8) =13614a(9) =59878a(10) =268728a(11) =1214032a(12) =5546558a(13) =25498422a(14) =118054700a(15) =549367029a(16) =2569472992a(17) =12066493332a(18) =56883907318a(19) =269035738044
External references
- oeis: A149303