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, 0, 1), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148317
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, 0, 1), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =39a(6) =125a(7) =393a(8) =1338a(9) =4568a(10) =16140a(11) =57955a(12) =211441a(13) =784037a(14) =2938223a(15) =11144377a(16) =42656950a(17) =164683455a(18) =640849659a(19) =2510334400a(20) =9898182076a(21) =39244156602a(22) =156425354900a(23) =626478426609
External references
- oeis: A148317