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), (0, -1, 0), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
A150996
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), (0, -1, 0), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =172a(5) =794a(6) =3738a(7) =17830a(8) =85774a(9) =415198a(10) =2020718a(11) =9873217a(12) =48400818a(13) =237896624a(14) =1171802761a(15) =5782520122a(16) =28578832172a(17) =141428488154a(18) =700672333743
External references
- oeis: A150996