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, 1, -1), (0, 0, -1), (0, 0, 1), (1, 0, 0)}.
A149910
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, 1, -1), (0, 0, -1), (0, 0, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =45a(5) =148a(6) =502a(7) =1766a(8) =6432a(9) =23753a(10) =89949a(11) =344107a(12) =1337603a(13) =5257450a(14) =20867047a(15) =83699338a(16) =337925520a(17) =1376164889a(18) =5635244713a(19) =23226831515a(20) =96241844903a(21) =400714413394
External references
- oeis: A149910