The number of returns to the origin in all possible one-dimensional walks of length 2n.
A172060
The number of returns to the origin in all possible one-dimensional walks of length 2n.
Terms
- a(0) =0a(1) =2a(2) =14a(3) =76a(4) =374a(5) =1748a(6) =7916a(7) =35096a(8) =153254a(9) =661636a(10) =2831300a(11) =12030632a(12) =50826684a(13) =213707336a(14) =894945944a(15) =3734901296a(16) =15540685574a(17) =64496348516a(18) =267060529364
External references
- oeis: A172060