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, 0, 1), (-1, 1, 0), (1, 0, 1), (1, 1, -1)}.
A149413
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, 0, 1), (-1, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =53a(5) =177a(6) =828a(7) =3092a(8) =14784a(9) =57789a(10) =280272a(11) =1135447a(12) =5552568a(13) =23024141a(14) =113220356a(15) =477899480a(16) =2359089266a(17) =10094151186a(18) =49965552101a(19) =216128476308
External references
- oeis: A149413