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, 0, 0), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
A148819
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, 0, 0), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =92a(6) =311a(7) =1161a(8) =4418a(9) =16770a(10) =66734a(11) =264292a(12) =1066008a(13) =4380303a(14) =17942834a(15) =74820454a(16) =313808725a(17) =1319581995a(18) =5616581050a(19) =23932844268a(20) =102589135624a(21) =442708044443
External references
- oeis: A148819