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, 0, 0)}.
A150144
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, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =73a(5) =283a(6) =1142a(7) =4755a(8) =20265a(9) =88008a(10) =388019a(11) =1732149a(12) =7813150a(13) =35552366a(14) =162990372a(15) =752066174a(16) =3489693468a(17) =16272504647a(18) =76209077491a(19) =358289119715
External references
- oeis: A150144