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), (0, 1), (1, -1), (1, 1)}.
A151314
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), (0, 1), (1, -1), (1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =49a(4) =277a(5) =1479a(6) =8679a(7) =49974a(8) =301169a(9) =1805861a(10) =11097563a(11) =68225081a(12) =425527103a(13) =2660509721a(14) =16787151965a(15) =106242633509a(16) =676589551793
External references
- oeis: A151314