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, -1), (0, 1, 0), (1, -1, 0), (1, 1, 1)}.
A150725
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, -1), (0, 1, 0), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =122a(5) =496a(6) =2256a(7) =9758a(8) =45330a(9) =203168a(10) =957032a(11) =4384498a(12) =20844492a(13) =96970229a(14) =464178852a(15) =2183124710a(16) =10503864829a(17) =49816232559a(18) =240665055849
External references
- oeis: A150725