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), (-1, 1, 0), (0, 0, 1), (1, 0, -1)}.
A148075
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), (-1, 1, 0), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =21a(6) =56a(7) =169a(8) =482a(9) =1505a(10) =4655a(11) =14419a(12) =46683a(13) =153632a(14) =522567a(15) =1760914a(16) =6050077a(17) =20830801a(18) =72215812a(19) =256321026a(20) =908687720a(21) =3272602542a(22) =11754785559a(23) =42458425816a(24) =154767487534a(25) =565357807589
External references
- oeis: A148075