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, 0), (-1, 1, 1), (0, -1, 0), (0, 1, -1), (1, 1, 0)}.
A149336
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, 0), (-1, 1, 1), (0, -1, 0), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =40a(5) =147a(6) =552a(7) =2108a(8) =8316a(9) =33289a(10) =134841a(11) =553959a(12) =2298348a(13) =9612184a(14) =40539298a(15) =172119016a(16) =735000952a(17) =3156525934a(18) =13621846126a(19) =59039338928a(20) =256950972772
External references
- oeis: A149336