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), (1, 0, 1), (1, 1, -1)}.
A149417
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), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =54a(5) =203a(6) =913a(7) =3791a(8) =17421a(9) =76369a(10) =357010a(11) =1610906a(12) =7618852a(13) =35049764a(14) =167219609a(15) =780154851a(16) =3746904339a(17) =17660665005a(18) =85252847312a(19) =405012623438
External references
- oeis: A149417