Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 1), (-1, 0), (0, 1), (1, 1)}.
A151292
Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 1), (-1, 0), (0, 1), (1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =85a(5) =314a(6) =1207a(7) =4682a(8) =18493a(9) =73688a(10) =296671a(11) =1202849a(12) =4910689a(13) =20158436a(14) =83169871a(15) =344628527a(16) =1433631973a(17) =5984532728a(18) =25060514887a(19) =105240685511a(20) =443102517025
External references
- oeis: A151292