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), (1, 0, 0), (1, 1, -1)}.
A150215
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), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =81a(5) =334a(6) =1428a(7) =6283a(8) =28204a(9) =128605a(10) =593492a(11) =2765382a(12) =12986012a(13) =61373153a(14) =291608306a(15) =1391797307a(16) =6668339795a(17) =32054662762a(18) =154527631682a(19) =746801740045
External references
- oeis: A150215