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, 0, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
A149046
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, 0, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =38a(5) =141a(6) =574a(7) =2345a(8) =10064a(9) =43483a(10) =191640a(11) =853025a(12) =3840296a(13) =17442407a(14) =79843694a(15) =367883558a(16) =1705065009a(17) =7941414689a(18) =37158646595a(19) =174544395929a(20) =822892445849
External references
- oeis: A149046