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, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1), (1, 0, 1)}.
A150861
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, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =143a(5) =642a(6) =2998a(7) =14072a(8) =67242a(9) =322573a(10) =1562132a(11) =7587183a(12) =37053764a(13) =181362866a(14) =890748249a(15) =4382280763a(16) =21608774431a(17) =106691560796a(18) =527608687921
External references
- oeis: A150861