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), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
A148914
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), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =32a(5) =110a(6) =440a(7) =1668a(8) =7012a(9) =28078a(10) =120543a(11) =499524a(12) =2184674a(13) =9269697a(14) =41042966a(15) =177243697a(16) =792410206a(17) =3468322344a(18) =15624044856a(19) =69115751198a(20) =313277217605
External references
- oeis: A148914