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, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149225
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, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =44a(5) =150a(6) =683a(7) =2629a(8) =12205a(9) =50241a(10) =236366a(11) =1015593a(12) =4822869a(13) =21335021a(14) =102023865a(15) =460878520a(16) =2215801954a(17) =10167652064a(18) =49093076267a(19) =228011894094
External references
- oeis: A149225