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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
A150452
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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =105a(5) =425a(6) =1977a(7) =8631a(8) =41261a(9) =187676a(10) =910559a(11) =4246915a(12) =20787681a(13) =98571981a(14) =485219638a(15) =2327411883a(16) =11500348994a(17) =55622208284a(18) =275578607198
External references
- oeis: A150452