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, 1), (-1, 1, -1), (0, 1, -1), (1, 0, 0)}.
A148142
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, 1), (-1, 1, -1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =29a(6) =84a(7) =253a(8) =787a(9) =2524a(10) =8272a(11) =27681a(12) =93992a(13) =324160a(14) =1131441a(15) =3994529a(16) =14238319a(17) =51190194a(18) =185499077a(19) =676953745a(20) =2486659955a(21) =9187994267a(22) =34130236566a(23) =127410380352a(24) =477810843993
External references
- oeis: A148142