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, 0, 1), (1, 1, -1)}.
A149432
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, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =45a(5) =174a(6) =710a(7) =2829a(8) =11685a(9) =49826a(10) =212370a(11) =908756a(12) =3967406a(13) =17428452a(14) =76575883a(15) =339309966a(16) =1515297265a(17) =6775762236a(18) =30392803463a(19) =137107357008a(20) =620274107946
External references
- oeis: A149432