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, 0, 1), (-1, 1, 1), (0, 0, 1), (1, -1, 1), (1, 0, -1)}.
A148362
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, 0, 1), (-1, 1, 1), (0, 0, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =46a(6) =162a(7) =573a(8) =2186a(9) =8411a(10) =33783a(11) =136964a(12) =570345a(13) =2395284a(14) =10241316a(15) =44112212a(16) =192417802a(17) =844668469a(18) =3742462954a(19) =16672149834a(20) =74799056643a(21) =337155007308
External references
- oeis: A148362