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, 0, 0), (-1, 1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149808
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, 0, 0), (-1, 1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =91a(5) =391a(6) =1911a(7) =8745a(8) =43141a(9) =203145a(10) =1007609a(11) =4826733a(12) =24013317a(13) =116273537a(14) =579500509a(15) =2826359467a(16) =14101820227a(17) =69129752095a(18) =345154523255
External references
- oeis: A149808