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), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
A149329
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), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =39a(5) =148a(6) =550a(7) =2071a(8) =8161a(9) =32396a(10) =128707a(11) =521583a(12) =2129664a(13) =8706306a(14) =35920334a(15) =149087733a(16) =619863981a(17) =2589541208a(18) =10865234502a(19) =45674123835a(20) =192548458938a(21) =814243566145
External references
- oeis: A149329