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, -1, 1), (-1, 0, -1), (0, -1, 0), (1, 1, 0)}.
A149083
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, -1, 1), (-1, 0, -1), (0, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =30a(5) =69a(6) =287a(7) =803a(8) =3138a(9) =10177a(10) =37851a(11) =135425a(12) =493536a(13) =1859619a(14) =6827926a(15) =26218013a(16) =98487896a(17) =379467237a(18) =1460428043a(19) =5637281913a(20) =22071239906a(21) =85752468617a(22) =338697420388
External references
- oeis: A149083