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, 0, 1), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
A149610
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, 0, 1), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =63a(5) =235a(6) =1037a(7) =4313a(8) =19495a(9) =84249a(10) =387915a(11) =1726215a(12) =8054891a(13) =36582539a(14) =172265491a(15) =793487203a(16) =3763039799a(17) =17523031749a(18) =83576063061a(19) =392543184021
External references
- oeis: A149610