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), (0, 0, 1), (0, 1, 1), (1, -1, 0)}.
A149891
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), (0, 0, 1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =45a(5) =153a(6) =548a(7) =2019a(8) =7617a(9) =29412a(10) =115631a(11) =460957a(12) =1862485a(13) =7607179a(14) =31357468a(15) =130386179a(16) =546204674a(17) =2303103834a(18) =9770915090a(19) =41679263631a(20) =178659773792a(21) =769340135930
External references
- oeis: A149891