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), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 1, 1)}.
A150873
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), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =147a(5) =657a(6) =3040a(7) =14101a(8) =66486a(9) =314372a(10) =1499644a(11) =7171861a(12) =34481451a(13) =166138901a(14) =803280189a(15) =3890825365a(16) =18891672745a(17) =91864473277a(18) =447507922130
External references
- oeis: A150873