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, -1, -1), (-1, 1, 1), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.
A150156
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, -1, -1), (-1, 1, 1), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =74a(5) =292a(6) =1198a(7) =5028a(8) =21622a(9) =94588a(10) =419610a(11) =1878692a(12) =8496032a(13) =38730284a(14) =177775372a(15) =820162304a(16) =3804035456a(17) =17724013876a(18) =82916301210a(19) =389148105248
External references
- oeis: A150156