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), (0, -1, 1), (0, 1, -1), (1, 1, 0)}.
A149276
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), (0, -1, 1), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =42a(5) =154a(6) =607a(7) =2457a(8) =10096a(9) =42635a(10) =181063a(11) =783097a(12) =3404412a(13) =14968062a(14) =66152869a(15) =294491008a(16) =1317205403a(17) =5921288039a(18) =26725832213a(19) =121082990990a(20) =550409795013
External references
- oeis: A149276