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, 0), (1, -1), (1, 0), (1, 1)}.
A151300
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, 0), (1, -1), (1, 0), (1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =118a(5) =469a(6) =2039a(7) =8559a(8) =37909a(9) =164062a(10) =735698a(11) =3246436a(12) =14688132a(13) =65690534a(14) =299227510a(15) =1351439955a(16) =6188946223a(17) =28161550486a(18) =129528141204a(19) =592866204918
External references
- oeis: A151300