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, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148091
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, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =24a(6) =75a(7) =216a(8) =714a(9) =2207a(10) =7436a(11) =24191a(12) =86048a(13) =293747a(14) =1067294a(15) =3730715a(16) =13746151a(17) =49287908a(18) =185552315a(19) =679296274a(20) =2582590609a(21) =9579477462a(22) =36808351636a(23) =138548906824a(24) =538038570723
External references
- oeis: A148091