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, 0), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
A148591
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, 0), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =57a(6) =191a(7) =631a(8) =2153a(9) =7593a(10) =26985a(11) =98071a(12) =361345a(13) =1338423a(14) =5051312a(15) =19068103a(16) =73036222a(17) =280693079a(18) =1086439277a(19) =4235355213a(20) =16553722376a(21) =65194738319a(22) =257295232507
External references
- oeis: A148591