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), (1, -1, 0), (1, 0, -1), (1, 0, 1)}.
A148599
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), (1, -1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =58a(6) =186a(7) =619a(8) =2127a(9) =7353a(10) =26625a(11) =94737a(12) =352669a(13) =1300437a(14) =4903873a(15) =18531848a(16) =71085948a(17) =272423138a(18) =1060824342a(19) =4118140139a(20) =16198708673a(21) =63670400823a(22) =252505594939
External references
- oeis: A148599