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, 1, 1), (0, 1, -1), (0, 1, 0), (1, -1, 1)}.
A148433
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, 1, 1), (0, 1, -1), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =19a(5) =62a(6) =239a(7) =864a(8) =3566a(9) =13868a(10) =58920a(11) =239080a(12) =1036763a(13) =4332325a(14) =19075298a(15) =81448735a(16) =362573593a(17) =1573070743a(18) =7063456476a(19) =31032442606a(20) =140305062067a(21) =622585027321
External references
- oeis: A148433