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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, 0)}.
A151123
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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =194a(5) =856a(6) =3890a(7) =17830a(8) =82971a(9) =388477a(10) =1834877a(11) =8703169a(12) =41528349a(13) =198727147a(14) =955077237a(15) =4599930984a(16) =22224771699a(17) =107562167514a(18) =521828866882
External references
- oeis: A151123