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, 0), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150518
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, 0), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =430a(6) =1895a(7) =8402a(8) =38277a(9) =175068a(10) =813789a(11) =3794409a(12) =17880963a(13) =84470730a(14) =401997555a(15) =1916947321a(16) =9189900979a(17) =44129232656a(18) =212749876799
External references
- oeis: A150518