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, 0, 0), (0, -1, 1), (0, 1, 0), (0, 1, 1), (1, 1, -1)}.
A150509
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, 0, 0), (0, -1, 1), (0, 1, 0), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =421a(6) =1826a(7) =8034a(8) =36106a(9) =164248a(10) =755561a(11) =3506429a(12) =16389676a(13) =77084134a(14) =364407891a(15) =1730410838a(16) =8248698860a(17) =39452993279a(18) =189262877746a(19) =910308265005
External references
- oeis: A150509