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, 1, 0), (1, 0, 0), (1, 1, -1)}.
A149824
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, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =82a(6) =276a(7) =950a(8) =3310a(9) =12078a(10) =44530a(11) =166938a(12) =643884a(13) =2497582a(14) =9846816a(15) =39300510a(16) =157864202a(17) =640945466a(18) =2623007032a(19) =10794098482a(20) =44800697192a(21) =186807264986a(22) =783544937362
External references
- oeis: A149824