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, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
A150502
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, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =403a(6) =1737a(7) =7244a(8) =31911a(9) =137926a(10) =615976a(11) =2717221a(12) =12268696a(13) =54843343a(14) =249585694a(15) =1127105125a(16) =5158721778a(17) =23478404133a(18) =107958051841a(19) =494269144847
External references
- oeis: A150502