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), (-1, 0, 0), (1, 0, 0), (1, 1, 0)}.
A150300
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), (-1, 0, 0), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =80a(5) =275a(6) =1120a(7) =4164a(8) =17627a(9) =68636a(10) =297325a(11) =1194403a(12) =5261790a(13) =21631711a(14) =96502081a(15) =403736439a(16) =1818348174a(17) =7712720923a(18) =35000405956a(19) =150124914344a(20) =685486436315
External references
- oeis: A150300