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), (0, 1, 1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
A151250
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), (0, 1, 1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =4a(2) =17a(3) =81a(4) =387a(5) =1882a(6) =9239a(7) =45476a(8) =225097a(9) =1115850a(10) =5543901a(11) =27581511a(12) =137343231a(13) =684560964a(14) =3413759073a(15) =17033098407a(16) =85017930387a(17) =424482793264
External references
- oeis: A151250