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, 0, 1), (-1, 1, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A149068
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, 0, 1), (-1, 1, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =42a(5) =169a(6) =721a(7) =3105a(8) =13838a(9) =62047a(10) =283633a(11) =1303734a(12) =6061730a(13) =28318686a(14) =133282890a(15) =629750099a(16) =2990908792a(17) =14249878475a(18) =68148765938a(19) =326757727504
External references
- oeis: A149068