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, 0, 1), (-1, 1, 0), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149459
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, 0, 1), (-1, 1, 0), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =50a(5) =205a(6) =865a(7) =3740a(8) =16580a(9) =74723a(10) =340133a(11) =1566675a(12) =7278445a(13) =34032294a(14) =160099893a(15) =757146959a(16) =3595868383a(17) =17142001362a(18) =81998483431a(19) =393381923307
External references
- oeis: A149459