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, 0), (1, -1, 1), (1, 0, -1), (1, 0, 1)}.
A148886
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, 0), (1, -1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =100a(6) =389a(7) =1449a(8) =5973a(9) =23504a(10) =99549a(11) =407127a(12) =1761889a(13) =7397553a(14) =32482799a(15) =139101540a(16) =617747515a(17) =2685316297a(18) =12031155473a(19) =52920320631a(20) =238795119056
External references
- oeis: A148886