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, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
A149045
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, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =38a(5) =137a(6) =577a(7) =2291a(8) =10009a(9) =41841a(10) =187031a(11) =811230a(12) =3684936a(13) =16361745a(14) =75298511a(15) =339975656a(16) =1580274100a(17) =7227506775a(18) =33851197613a(19) =156428458866a(20) =737098177726
External references
- oeis: A149045